Menace, lifelink
If a nontoken creature an opponent controls would die, exile it instead. When you do, you may pay . If you do, create a 1/1 black and green Pest creature token with "When this token dies, you gain 1 life."

Devoid (This card has no color.)
When you cast this spell, you may pay . If you do, gain control of target creature until end of turn, untap that creature, and it gains haste until end of turn. ( represents colorless mana.)
Haste

Changeling (This card is every creature type.)
Deathtouch

: Add .
: Add or . This artifact deals 1 damage to you.

: Add . Spend this mana only to cast artifact spells or activate abilities of artifacts.
Equipped creatures you control have flying and haste.

Defender (This creature can't attack.)
Flying

: Add .
, : This land becomes a copy of target land, except it has this ability.

Whenever another nontoken creature enters, you may pay . If you do, that creature's controller creates a token that's a copy of that creature.

This land enters tapped.
: Add or .
: This land becomes a 1/4 white and black Nightmare creature until end of turn. It's still a land.
Whenever this land attacks, defending player loses 2 life and you gain 2 life.

Flash
Flying
Creatures entering don't cause abilities to trigger.

(: Add .)

You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice that creature at the beginning of the next end step.
Splice onto Arcane (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

Trample
Lizard Formula — When Lizard, Connors's Curse enters, up to one other target creature loses all abilities and becomes a green Lizard creature with base power and toughness 4/4.

Whenever Fire Lord Ozai attacks, you may sacrifice another creature. If you do, add an amount of equal to the sacrificed creature's power. Until end of combat, you don't lose this mana as steps end.
: Exile the top card of each opponent's library. Until end of turn, you may play one of those cards without paying its mana cost.

Mobilize 2 (Whenever this creature attacks, create two tapped and attacking 1/1 red Warrior creature tokens. Sacrifice them at the beginning of the next end step.)
During your end step, Warrior tokens you control have "This token can't be sacrificed."

(: Add or .)
This land enters tapped.
Cycling (, Discard this card: Draw a card.)

Put any number of target creature cards from your graveyard on top of your library.
Draw a card.

Reach, menace
When Rendmaw enters and whenever you play a card with two or more card types, each player creates a tapped 2/2 black Bird creature token with flying. The tokens are goaded for the rest of the game. (They attack each combat if able and attack a player other than you if able.)