First strike, haste
Whenever a player taps a land for mana, if this creature is tapped, that player adds one mana of any type that land produced. Then that land deals 1 damage to that player.

(Gain the next level as a sorcery to add its ability.)
Legendary creatures you control enter with an additional +1/+1 counter on them.
: Level 2
Legendary spells you cast cost less to cast. This effect reduces only the amount of colored mana you pay.
: Level 3
Whenever you cast a legendary spell, exile the top two cards of your library. You may play them this turn.

Reach, vigilance
Other creatures you control get +1/+1.
Whenever you attack, draw a card.

Reach, vigilance
If you would draw a card except the first one you draw in each of your draw steps, draw two cards instead.
If one or more tokens would be created under your control, twice that many of those tokens are created instead.

Reach
Whenever you draw your second card each turn, put a +1/+1 counter on target creature. It gains lifelink until end of turn.

Job select
Equipped creature gets +2/+2, has reach, and is a Bard in addition to its other types.
Perseus's Bow — Equip

You may cast this spell as though it had flash if you control a Human.
Other creatures you control get +1/+1.
Whenever this creature enters or attacks, recruit.

Target opponent draws a card.
You gain 7 life.

, : Draw a card. X is the number of cards in an opponent's hand.

Target attacking creature gets +2/+2 until end of turn. Each attacking non-Human creature gains trample until end of turn.

Haste
Mentor

When this creature dies, exile it, then shuffle all creature cards from your graveyard into your library.

Equipped creature gets +0/+1.
As long as equipped creature's toughness is greater than its power, it assigns combat damage equal to its toughness rather than its power.
Equip

: Add .

Changeling
Reach
: Put target card from your graveyard on the bottom of your library.

This creature enters with a +1/+1 counter on it.
, Remove a +1/+1 counter from this creature: This creature gains hexproof until end of turn.

Whenever you expend 4, this creature gains indestructible until end of turn.

Target creature gets +2/+2 until end of turn.
Conspire

: Target creature doesn't untap during its controller's next untap step.

This land enters tapped.
: Add or .

Whenever one or more tokens you control enter, create a 1/1 black Vampire Rogue creature token with lifelink. This ability triggers only once each turn.
, Sacrifice another creature or artifact: Draw a card.

Whenever you cast a black spell from your hand, Baron Helmut Zemo connives.
Boast — Exile any number of black cards from your graveyard with fifteen or more black mana symbols among their mana costs: Copy those exiled cards. You may cast up to three of the copies without paying their mana costs. (Activate only if this creature attacked this turn and only once each turn.)

Flying
Whenever a creature dealt damage by Baron Sengir this turn dies, put a +2/+2 counter on Baron Sengir.
: Regenerate another target Vampire.

Villain spells you cast cost less to cast.
Whenever another Villain you control enters, you may have it connive. Do this only once each turn.