Fires of Undeath deals 2 damage to any target.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Search target opponent's library for four cards with different names and reveal them. That player chooses two of those cards. Put the chosen cards into the player's graveyard and the rest into your hand. Then that player shuffles their library.

Search target opponent's library for four cards with different names and reveal them. That player chooses two of those cards. Put the chosen cards into the player's graveyard and the rest into your hand. Then that player shuffles their library.

Flying, first strike
If a source would deal damage to an opponent or a permanent an opponent controls, that source deals double that damage to that player or permanent instead.
If a source would deal damage to you or a permanent you control, prevent half that damage, rounded up.

Sacrifice an artifact: Gnathosaur gains trample until end of turn.

Flying
When Gryff Vanguard enters the battlefield, draw a card.

Flying, haste
: Hellkite Igniter gets +X/+0 until end of turn, where X is the number of artifacts you control.

Flying
As Iona, Shield of Emeria enters the battlefield, choose a color.
Your opponents can't cast spells of the chosen color.

At the beginning of your upkeep, you gain X life, where X is the number of cards in your hand minus 4.

Whenever you draw a card, you may have target player mill a card.

[+2]: Look at the top card of target player's library. You may put that card on the bottom of that player's library.
[0]: Draw three cards, then put two cards from your hand on top of your library in any order.
[−1]: Return target creature to its owner's hand.
[−12]: Exile all cards from target player's library, then that player shuffles their hand into their library.

Double strike, vigilance
Whenever you cast a creature spell with converted mana cost 5 or greater, you get an experience counter.
Kalemne, Disciple of Iroas gets +1/+1 for each experience counter you have.

Level up (: Put a level counter on this. Level up only as a sorcery.)
LEVEL 4-7
4/4
Flying
LEVEL 8+
8/8
Flying, trample
: Kargan Dragonlord gets +1/+0 until end of turn.

[+4]: Target player exiles a card from their hand.
[−3]: Exile target permanent.
[−14]: Restart the game, leaving in exile all non-Aura permanent cards exiled with Karn Liberated. Then put those cards onto the battlefield under your control.

Landfall — Whenever a land enters the battlefield under your control, you may put a quest counter on Khalni Heart Expedition.
Remove three quest counters from Khalni Heart Expedition and sacrifice it: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle your library.

[+1]: Untap up to one target creature and up to one target land.
[−2]: Reveal the top four cards of your library. You may put a creature card and/or a land card from among them into your hand. Put the rest into your graveyard.
[−8]: You get an emblem with "Whenever a creature enters the battlefield under your control, you may have it fight target creature." Then create three 8/8 blue Octopus creature tokens.

First strike (This creature deals combat damage before creatures without first strike.)
Other Knight creatures you control get +1/+1 and have indestructible. (Damage and effects that say "destroy" don't destroy them.)

[+1]: Untap target Mountain. It becomes a 4/4 red Elemental creature until end of turn. It's still a land.
[−2]: Add for each Mountain you control.
[−5]: You get an emblem with "Mountains you control have ': This land deals 1 damage to any target.'"

(Theme color: )

Trample
Whenever Liege of the Tangle deals combat damage to a player, you may choose any number of target lands you control and put an awakening counter on each of them. Each of those lands is an 8/8 green Elemental creature for as long as it has an awakening counter on it. They're still lands.