[+1]: Target player loses 2 life.
[−1]: Return target creature card from your graveyard to your hand.
[−7]: Destroy up to two target creatures. Put up to two creature cards from graveyards onto the battlefield under your control.

Partner with Ley Weaver (When this creature enters the battlefield, target player may put Ley Weaver into their hand from their library, then shuffle.)
: Target player draws two cards.

Flash
When Lurking Deadeye enters the battlefield, destroy target creature that was dealt damage this turn.

Enchant creature
As Metamorphic Alteration enters the battlefield, choose a creature.
Enchanted creature is a copy of the chosen creature.

First strike, hexproof
Whenever Narset, Enlightened Master attacks, exile the top four cards of your library. Until end of turn, you may cast noncreature spells from among those cards without paying their mana costs.

Reach

You may pay and tap four untapped creatures you control with flying rather than pay this spell's mana cost.
Flying, lifelink
Other creatures you control with flying have indestructible. (Damage and effects that say "destroy" don't destroy them.)

When Setessan Petitioner enters the battlefield, you gain life equal to your devotion to green. (Each in the mana costs of permanents you control counts toward your devotion to green.)

Flying
When Shepherd of Heroes enters the battlefield, you gain 2 life for each creature in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)

Each player chooses a creature or planeswalker they control, then sacrifices the rest. Players can't cast creature or planeswalker spells until the end of your next turn.

Defender
Landfall — Whenever a land enters the battlefield under your control, Skyclave Squid can attack this turn as though it didn't have defender.

[+2]: Create two 0/1 black Thrull creature tokens.
[+1]: You may sacrifice another creature or planeswalker. If you do, draw two cards, then draw another card if the sacrificed permanent was a commander.
[−10]: Gain control of all commanders. Put all commanders from the command zone onto the battlefield under your control.
Tevesh Szat, Doom of Fools can be your commander.
Partner

First strike
You may look at the top card of your library any time.
As long as an opponent controls more lands than you, you may play lands from the top of your library. (You can play a land this way only if you have an available land play remaining.)

[+2]: You may sacrifice another permanent. If you do, you gain 1 life and draw a card.
[−3]: Destroy target nonland permanent with converted mana cost 3 or less.
[−9]: You get an emblem with "Whenever a creature you control deals combat damage to a player, that player loses the game."

Defender
: Wishful Merfolk loses defender and becomes a Human until end of turn.