Defender (This creature can't attack.)
: Regenerate this creature.

Haste
When Tuktuk the Explorer dies, create Tuktuk the Returned, a legendary 5/5 colorless Goblin Golem artifact creature token.

Artifact spells you cast have convoke. (Your creatures can help cast those spells. Each creature you tap while casting an artifact spell pays for or one mana of that creature's color.)

When this creature dies, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this token: Add ."

, Exile cards from your graveyard equal to the number of opponents you have: Target creature card in your graveyard gains encore until end of turn. The encore cost is equal to its mana cost. (Exile the creature card and pay its mana cost: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

At the beginning of each end step, if a player discarded a card this turn, create a 1/1 black Bird creature token with flying and "This token can't block."
, : Each opponent discards a card. Activate only as a sorcery.

Trample
When this creature enters, scry 3, then reveal the top card of your library. You gain life equal to that card's mana value.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for .)
Ward
Whenever this creature or another artifact you control enters, put a +1/+1 counter on this creature. It can't be blocked this turn.

This creature gets +1/+1 as long as no opponent controls a white or blue creature.

Haste
Whenever a player casts their second spell each turn, this creature deals 2 damage to target opponent.

Each player other than target player creates a 5/5 red Dragon creature token with flying.

Enchant planeswalker
Enchanted planeswalker has "[+1]: Look at the top four cards of your library. You may reveal a creature or land card from among them and put it into your hand. Put the rest on the bottom of your library in a random order."
Whenever a nontoken creature you control enters, put a loyalty counter on enchanted planeswalker.

Enchant creature
Enchanted creature doesn't untap during its controller's untap step.

Shadow (This creature can block or be blocked by only creatures with shadow.)
At the beginning of your upkeep, sacrifice this creature unless you pay .

Flying
When this creature enters, you gain 2 life.

, : Draw a card, then discard a card.

Flying
At the beginning of your upkeep, draw a card unless target opponent sacrifices a creature of their choice or pays 3 life.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Changeling (This card is every creature type.)
: Regenerate this creature.

Haste
Whenever a creature an opponent controls dies, put a +1/+1 counter on Yahenni.
Sacrifice another creature: Yahenni gains indestructible until end of turn.