Dragon's Rage Channeler

Because damage remains marked on a creature until the cleanup step or an effect removes that damage, nonlethal damage dealt to Dragon's Rage Channeler may become lethal if the number of card types found in your graveyard drops below four.

The card types that can appear in a graveyard are artifact, battle, creature, enchantment, instant, kindred, land, planeswalker, and sorcery. Legendary, basic, and snow are supertypes, not card types; Human and Shaman are subtypes, not card types.

Whenever you cast a noncreature spell, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)
Delirium — As long as there are four or more card types among cards in your graveyard, Dragon's Rage Channeler gets +2/+2, has flying, and attacks each combat if able.

Gush

You may return two Islands you control to their owner's hand rather than pay this spell's mana cost.
Draw two cards.

Eternal Weekend
Vintage Championship 2023

Mental Misstep

A card with Phyrexian mana symbols in its mana cost is each color that appears in that mana cost, regardless of how that cost may have been paid.

As you cast a spell or activate an activated ability with one or more Phyrexian mana symbols in its cost, you choose how to pay for each Phyrexian mana symbol at the same time you would choose modes or choose a value for X.

Each Phyrexian mana symbol in a spell's mana cost contributes 1 to that spell's mana value. For example, Mental Misstep's mana value is 1, regardless of how its cost was paid.

If a spell has {X} in its mana cost, X is considered to be the value chosen for it while that spell is on the stack.

If you're at 1 life or less, you can't pay 2 life.

Phyrexian mana is not a new color. Players can't produce Phyrexian mana.

To calculate the mana value of a card with Phyrexian mana symbols in its cost, count each Phyrexian mana symbol as 1.

({U/P} can be paid with either {U} or 2 life.)
Counter target spell with mana value 1.

Ponder

If you choose to shuffle your library, that includes the three cards you just looked at and put back on top of it.

Look at the top three cards of your library, then put them back in any order. You may shuffle.
Draw a card.

Card (4)	Type	^{$0.00 (0.00)} Price
Dragon's Rage Channeler - 1997	Creature	$0.00 ^(0.00)
Gush - 1997	Instant	$0.00 ^(0.00)
Mental Misstep - 1997	Instant	$0.00 ^(0.00)
Ponder - 1997	Sorcery	$0.00 ^(0.00)