Aven Mindcensor

After the search is complete, the entire library is shuffled.

Each search works exactly the same as normal except that the opponent doing the searching sees only the top four cards of that library. They can't look at the other cards in that library at all. Cards not in the top four cards of the library can't be found in the search, even if they're identifiable in some manner.

For effects that check whether a player searched a library or may search a library, searching the top four cards of that library counts as searching that library.

If an effect uses the word "search" once but allows an opponent to search for multiple cards, the top four cards remain the same throughout the entire search. Finding one card won't cause the fifth card to become included in the search.

Flash
Flying
If an opponent would search a library, that player searches the top four cards of that library instead.

Bolas's Citadel

Bolas’s Citadel lets you look at the top card of your library whenever you want (with one restriction—see below), even if you don’t have priority. This action doesn’t use the stack. Knowing what that card is becomes part of the information you have access to, just like you can look at the cards in your hand.

Bolas’s Citadel may be one of the permanents you sacrifice to activate its last ability.

If a spell has {X} in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.

If the top card of your library changes while you’re casting a spell, playing a land, or activating an ability, you can’t look at the new top card until you finish doing so. This means that if you cast the top card of your library, you can’t look at the next one until you’re done paying for that spell.

If you cast a spell for another cost “rather than pay its mana cost,” you can’t choose to cast it for any alternative costs. You can, however, pay additional costs. If the card has any mandatory additional costs, such as that of Spark Harvest, those must be paid to cast the card.

In a Two-Headed Giant game, the last ability of Bolas’s Citadel causes the opposing team to lose 20 life.

You can play a land card from the top of your library only if you have available land plays remaining.

You must follow the normal timing permissions and restrictions of the cards you play from your library.

You may look at the top card of your library any time.
You may play lands and cast spells from the top of your library. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost.
{T}, Sacrifice ten nonland permanents: Each opponent loses 10 life.

Dig Through Time

Because delve isn't an alternative cost, it can be used in conjunction with alternative costs, such as flashback. It can also be used to pay for additional costs that include generic mana.

Delve doesn't change a spell's mana cost or mana value. For example, Treasure Cruise's mana value is 8 even if you exiled three cards to cast it.

You can exile cards to pay only for generic mana, and you can't exile more cards than the generic mana requirement of a spell with delve. For example, you can't exile more than seven cards from your graveyard to cast Treasure Cruise unless an effect has increased its cost.

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)
Look at the top seven cards of your library. Put two of them into your hand and the rest on the bottom of your library in any order.

"I've been all over this world. I even remember some of those places."

Goblin Guide

If Goblin Guide is attacking a planeswalker, that planeswalker's controller is the defending player.

If the defending player reveals a nonland card, it remains on top of their library.

Haste
Whenever Goblin Guide attacks, defending player reveals the top card of their library. If it's a land card, that player puts it into their hand.

Orb of Dragonkind

A Dragon card is a card with the creature type Dragon in its type line. Similarly, a creature on the battlefield is a Dragon if it has the Dragon creature type. A card that has “Dragon” in the name (such as Orb of Dragonkind) isn't a Dragon card unless it also has the Dragon creature type.

{1}, {T}: Add two mana in any combination of colors. Spend this mana only to cast Dragon spells or activate abilities of Dragons.
{R}, {T}, Sacrifice Orb of Dragonkind: Look at the top seven cards of your library. You may reveal a Dragon card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Path of Ancestry

If Path of Ancestry's last ability produces two mana (most likely due to Mana Reflection), spending those two mana to cast creature spells that share a creature type with your commander will cause two abilities to trigger. Each of those abilities will cause you to scry 1. You won't scry 2. This is true whether you spend the mana on one creature spell or two.

If you cast your commander with mana from Path of Ancestry, and your commander hasn't somehow lost all of its creature types while on the stack, you'll scry 1.

If you don't have a commander, Path of Ancestry's ability produces no mana.

If your commander has no creature types, it can't share a creature type with any spell that you cast.

If your commander is a card that has no colors in its color identity, Path of Ancestry's ability produces no mana. It doesn't produce {C}.

If you have two commanders, the last ability adds one mana of any color in their combined color identities. When you spend that mana on a creature spell that shares a creature type with either of your commanders, you'll scry 1.

Your commander's creature types are checked immediately after you cast a creature spell spending mana from Path of Ancestry's last ability. They aren't set before the game begins, and they may not be the same types your commander had when you activated that ability.

Path of Ancestry enters the battlefield tapped.
{T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

In nature, not a single bone or scrap of flesh goes to waste.

Scavenging Ooze

If the target card is an illegal target when the ability tries to resolve, it won't resolve and none of its effects will happen. No +1/+1 counter will be put on Scavenging Ooze and you won't gain life. Notably, this means that if you activate Scavenging Ooze's ability multiple times targeting the same creature card, only the first instance of the ability to resolve will have any effect.

{G}: Exile target card from a graveyard. If it was a creature card, put a +1/+1 counter on Scavenging Ooze and you gain 1 life.

Xantcha, Sleeper Agent

If Xantcha can’t attack for any reason (such as being tapped or having come under that player’s control that turn), then it doesn’t attack. If there’s a cost associated with having it attack, the player isn’t forced to pay that cost, so it doesn’t have to attack in that case either.

If a player creates a token that’s a copy of Xantcha, the player who creates the token is its owner, not the player under whose control it enters the battlefield. This is a change from previous rules.

The player who draws a card when Xantcha’s last ability resolves is the player who activated the ability.

Xantcha’s controller may activate its last ability. In this case, the same player loses 2 life and draws a card.

Xantcha’s first ability is a replacement effect that modifies how it enters the battlefield, not a triggered ability. Players can’t take actions (such as activating its last ability) while Xantcha’s on the battlefield before it’s controlled by another player.

In a multiplayer game, if Xantcha’s owner leaves the game, Xantcha leaves the game with them. If Xantcha’s controller leaves the game, Xantcha is exiled. This is a change from previous rulings due to Xantcha’s updated wording.

Xantcha, Sleeper Agent enters the battlefield under the control of an opponent of your choice.
Xantcha attacks each combat if able and can't attack its owner or planeswalkers its owner controls.
{3}: Xantcha's controller loses 2 life and you draw a card. Any player may activate this ability.

Yuriko, the Tiger's Shadow

Activating Yuriko's commander ninjutsu ability isn't the same as casting Yuriko as a spell. You won't have to pay the commander tax to activate that ability, and activating that ability won't increase the commander tax to pay later.

Although the ninjutsu ability has the creature enter the battlefield attacking, it was never declared as an attacking creature (for the purposes of abilities that trigger whenever a creature attacks, for example).

Commander ninjutsu is a variant of ninjutsu that can be activated from the command zone as well as from your hand. Just as with regular ninjutsu, the Ninja enters attacking the player or planeswalker that the returned creature was attacking.

If a card in a player's library has {X} in its mana cost, X is considered to be 0.

Commander ninjutsu {U}{B} ({U}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand or the command zone tapped and attacking.)
Whenever a Ninja you control deals combat damage to a player, reveal the top card of your library and put that card into your hand. Each opponent loses life equal to that card's mana value.

Card (11)	Type	^{$0.00 (0.00)} Price
Aven Mindcensor - 1997	Creature	$0.00 ^(0.00)
Bolas's Citadel - 1997	Artifact	$0.00 ^(0.00)
Dig Through Time - 1997	Instant	$0.00 ^(0.00)
Goblin Guide - 1997	Creature	$0.00 ^(0.00)
Orb of Dragonkind	Artifact	$0.00 ^(0.00)
Orb of Dragonkind	Artifact	$0.00 ^(0.00)
Orb of Dragonkind	Artifact	$0.00 ^(0.00)
Path of Ancestry	Land	$0.00 ^(0.00)
Scavenging Ooze - 1997	Creature	$0.00 ^(0.00)
Xantcha, Sleeper Agent	Creature	$0.00 ^(0.00)
Yuriko, the Tiger's Shadow	Creature	$0.00 ^(0.00)

Love Your LGS 2021