Menace
Whenever Black Widow deals combat damage to a player, that player exiles cards from the top of their library until they exile a nonland card. You may put a +1/+1 counter on Black Widow. If you don't, you may cast the exiled nonland card until end of turn and mana of any type can be spent to cast that spell.

Flying
When this creature enters, gain control of target creature for as long as this creature remains on the battlefield.

Whenever a creature dies, put a charge counter on this enchantment.
At the beginning of your first main phase, add for each charge counter on this enchantment.

Trample
Whenever Ojer Kaslem deals combat damage to a player, reveal that many cards from the top of your library. You may put a creature card and/or a land card from among them onto the battlefield. Put the rest on the bottom in a random order.
When Ojer Kaslem dies, return it to the battlefield tapped and transformed under its owner's control.

As an additional cost to cast this spell, sacrifice a nonland permanent.
Exile target nonland permanent.
Flashback (You may cast this card from your graveyard for its flashback cost and any additional costs. Then exile it.)

0: Roll a six-sided die.
1 or 2 — [+2], then create two 1/1 green Squirrel creature tokens. They gain haste until end of turn.
3 — [−1], then return a card with mana value 2 or less from your graveyard to your hand.
4 or 5 — Comet deals damage equal to the number of loyalty counters on him to a creature or player, then [−2].
6 — [+1], and you may activate Comet's loyalty ability two more times this turn.

Copy target instant or sorcery spell, then return it to its owner's hand. You may choose new targets for the copy.

As an additional cost to cast this spell, you may exile any number of blue cards from your hand. This spell costs less to cast for each card exiled this way.
Up to X target creatures phase out. (While they're phased out, they're treated as though they don't exist. Each one phases in before its controller untaps during their next untap step.)

Flash
Flying
You may have this creature enter as a copy of a creature an opponent controls, except it's a Faerie Shapeshifter in addition to its other types and it has flying.

Destroy target land. If that land was nonbasic, Molten Rain deals 2 damage to the land's controller.

Haste
Whenever this creature is dealt damage, it deals that much damage to any other target. If a player is dealt damage this way, they can't gain life for the rest of the game.

Trample
Champion an Elemental (When this enters, sacrifice it unless you exile another Elemental you control. When this leaves the battlefield, that card returns to the battlefield.)

Haste
Merry has first strike as long as it's equipped.
Whenever you attack with Merry and another legendary creature, draw a card.

At the beginning of each end step, if you gained 3 or more life this turn, draw a card.

When this creature enters, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost this way. (Each in the mana costs of permanents you control counts toward your devotion to black.)

Flying
: This creature deals 1 damage to each creature and each player.

Artifact creatures you control get +2/+2.
: Create a token that's a copy of target artifact you control, except it's a 1/1 Soldier creature in addition to its other types.

Creature spells you control can't be countered.
Nontoken creatures you control have riot. (They enter with your choice of a +1/+1 counter or haste.)

If it's not your turn, you may exile a green card from your hand rather than pay this spell's mana cost.
Destroy up to two target artifacts and/or enchantments.

When Uro enters, sacrifice it unless it escaped.
Whenever Uro enters or attacks, you gain 3 life and draw a card, then you may put a land card from your hand onto the battlefield.
Escape—, Exile five other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)