Flying
When this creature dies, shuffle it into its owner's library.

Exile target creature. Its controller gains life equal to its power.

Creatures don't untap during their controllers' untap steps.
Whenever a creature enters, untap all creatures.

Each player puts a creature card from their graveyard onto the battlefield.

Flying
You, planeswalkers you control, and other creatures you control have hexproof.
: Put a +1/+1 counter on each creature you control.

Vigilance
This creature enters prepared.
Whenever this creature attacks, if you control eight or more lands, this creature becomes prepared.

Flying, lifelink
Whenever you cast a spell from anywhere other than your hand, you may cast a permanent spell with equal or lesser mana value from your hand without paying its mana cost. If you don't, you may put a land card from your hand onto the battlefield.

Add .

You lose 2 life and draw two cards, then clash with an opponent. If you win, repeat this process. (Each clashing player reveals the top card of their library, then puts that card on their choice of the top or bottom. A player wins if their card had a greater mana value.)

Whenever equipped creature deals damage to a creature, tap that creature. That creature doesn't untap during its controller's untap step for as long as this Equipment remains on the battlefield.
Whenever equipped creature deals damage to a player, that player loses 1 life.
Equip

: Add .
, , Sacrifice this artifact: Draw two cards.

At the beginning of your first main phase, add for each charge counter on this artifact.
, : Destroy target creature. Then put a charge counter on this artifact.

This spell costs less to cast for each creature on the battlefield.
Blasphemous Act deals 13 damage to each creature.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
When this creature enters, destroy target artifact, enchantment, or land.

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)
Skrelv can't block.
, : Choose a color. Another target creature you control gains toxic 1 and hexproof from that color until end of turn. It can't be blocked by creatures of that color this turn. ( can be paid with either or 2 life.)

Creatures you control have haste.
Creatures your opponents control enter tapped.

When this creature enters, choose target face-up exiled card. Its owner shuffles it into their library.

(Gain the next level as a sorcery to add its ability.)
When this Class enters, draw two cards, then discard two cards.
: Level 2
Creatures you control have ": Add or . Spend this mana only to cast an instant or sorcery spell or to gain a Class level."
: Level 3
Whenever you cast an instant or sorcery spell, that spell deals damage to each opponent equal to the number of instant and sorcery spells you've cast this turn.

+1: Create a 1/1 colorless Thopter artifact creature token with flying.
0: Draw a card. If you control three or more artifacts, draw two cards instead.
−9: You get an emblem with "At the beginning of your end step, search your library for a permanent card, put it onto the battlefield, then shuffle."

At the beginning of your upkeep, this creature deals 1 damage to each opponent. You gain life equal to the damage dealt this way.