Flying
Whenever this creature deals damage to a player, tap target creature that player controls. That creature doesn't untap during its controller's untap step for as long as this creature remains on the battlefield.

, : Destroy target white creature.

When a spell or ability an opponent controls causes you to discard this card, create four 1/1 colorless Gnome artifact creature tokens.
, : Create a 1/1 colorless Gnome artifact creature token.

If a red spell would deal damage to a permanent or player, it deals that much damage plus 1 to that permanent or player instead.

, : Destroy target green creature.

If you would draw a card, you may instead choose land or nonland and reveal cards from the top of your library until you reveal a card of the chosen kind. Put that card into your hand and put all other cards revealed this way on the bottom of your library in any order.

At the beginning of your upkeep, this artifact deals 2 damage to the creature with the least toughness. If two or more creatures are tied for least toughness, you choose one of them.

Whenever a creature dies, if another creature is on the battlefield, return the first card to the battlefield under its owner's control at the beginning of the next end step.

At the beginning of your upkeep, flip a coin. If you lose the flip, return this creature to its owner's hand.

Trample
At the beginning of your upkeep, sacrifice this creature unless you sacrifice an enchantment.

, : Tap X target lands.

Whenever Karn blocks or becomes blocked, it gets -4/+4 until end of turn.
: Target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value until end of turn.

: Untap this creature.
: This creature gains flying until end of turn.
: This creature gains shroud until end of turn. (It can't be the target of spells or abilities.)
: This creature gets +1/-1 until end of turn.
: This creature gets -1/+1 until end of turn.

Whenever this creature deals combat damage to defending player, it deals damage equal to its power to each blocking creature.

Whenever a creature you control enters, you gain life equal to its toughness.

At the beginning of your upkeep, you may put a verse counter on this enchantment.
, Sacrifice this enchantment: Return up to X target permanents to their owners' hands, where X is the number of verse counters on this enchantment.

At the beginning of your upkeep, this enchantment deals X damage to target opponent, where X is the number of cards in your hand minus the number of cards in that player's hand.

When an opponent casts a creature spell, if this permanent is an enchantment, it becomes a 5/5 Angel creature with flying and vigilance.

At the beginning of your upkeep, you may put a verse counter on this enchantment.
, Sacrifice this enchantment: Create X 3/3 green Beast creature tokens, where X is the number of verse counters on this enchantment.

, : Search your library for a creature card with mana value X or less, reveal it, put it into your hand, then shuffle.

Return all lands to their owners' hands.

At the beginning of your upkeep, you may put a verse counter on this enchantment.
, Sacrifice this enchantment: Look at target opponent's hand and choose up to X cards from it, where X is the number of verse counters on this enchantment. That player discards those cards.

At the beginning of your upkeep, you may put a verse counter on this enchantment.
, Sacrifice this enchantment: Destroy up to X target lands, where X is the number of verse counters on this enchantment.

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 4 damage to each other creature.

Destroy all lands or all creatures. Creatures destroyed this way can't be regenerated.

Flying
At the beginning of your upkeep, sacrifice this creature unless you pay .
Cycling (, Discard this card: Draw a card.)

: This creature deals 3 damage to target attacking or blocking creature.

Each player sacrifices four lands of their choice. Wildfire deals 4 damage to each creature.

Flying
When this creature enters, destroy target nonblack creature. It can't be regenerated.

Flying
When this creature enters, target player discards two cards.

Trample
At the beginning of your upkeep, sacrifice this creature unless you pay .
: Regenerate this creature.

Flying
Shroud (This creature can't be the target of spells or abilities.)

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
: Add . Target opponent gains control of this creature. (Activate only as an instant.)

Exile Time Spiral. Each player shuffles their hand and graveyard into their library, then draws seven cards. You untap up to six lands.

This creature doesn't untap during your untap step.
Pay 8 life: Untap this creature.
This creature can't be blocked except by three or more creatures.

Serra Avatar's power and toughness are each equal to your life total.
When Serra Avatar is put into a graveyard from anywhere, shuffle it into its owner's library.