: Add .
, : Target creature gains double strike until end of turn.

, : Add for each Swamp you control.

This land enters tapped.
: Add or .

(: Add .)
This land enters tapped.
, : Each opponent loses 1 life. Activate only if you control two or more black permanents.

Assault deals 2 damage to any target.

Blaze deals X damage to any target.

When this creature enters, you may search your library for an Elemental card, reveal it, then shuffle and put that card on top.

Double strike

Savage Twister deals X damage to each creature.

The next X damage that would be dealt to target creature, planeswalker, or player this turn is dealt to another target creature, planeswalker, or player instead.

Lightning Helix deals 3 damage to any target and you gain 3 life.

Whenever equipped creature deals combat damage to a player, you may draw two cards. If you do, discard a card.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

: Target creature gains haste until end of turn.
: Target creature gains first strike until end of turn.

: Exile target card from a graveyard.

Spend only black mana on X.
Consume Spirit deals X damage to any target and you gain X life.

Whenever this creature deals combat damage to a player, put a +1/+1 counter on it.
Modular 1 (This creature enters with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Whenever this artifact or another artifact enters, put a charge counter on this artifact.
, , Remove a charge counter from this artifact: Draw a card.

, or , : Return target artifact creature card from your graveyard to your hand.

Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.
Whenever a creature an opponent controls enters, you may attach this Aura to that creature.

Creatures of the creature type of your choice get +X/+X until end of turn.

Exile target attacking creature.

Double strike

When this creature enters, if you control two or more Mountains, you may destroy target artifact.
When this creature enters, if you control two or more Plains, you may destroy target enchantment.

Create X 1/1 red Goblin creature tokens.

Draw three cards. Then discard two cards unless you discard an artifact card.

, : Create a 0/1 colorless Pest artifact creature token.

Any player may have Browbeat deal 5 damage to them. If no one does, target player draws three cards.

First strike
Whenever another creature dies, you may put a +1/+1 counter on this creature.

Creatures you control have haste.
Sacrifice this enchantment: Target creature gets +2/+2 until end of turn.

Whenever equipped creature attacks, it deals damage equal to its power to the player or planeswalker it's attacking.
Equip

Search your library for an artifact card, reveal it, put it into your hand, then shuffle.

Zombie spells you cast cost less to cast.
Zombie creatures you control get +2/+1.

Trample
Whenever another artifact enters, put a +1/+1 counter on this creature.
Modular 1 (This creature enters with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Haste
Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, it deals 3 damage to target player or planeswalker.

, , Sacrifice this creature: It deals X damage to any target.