Flying
When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control this creature.

Whenever one or more cards are put into a library from anywhere, put a +1/+1 counter on this creature.
: Put target card from a graveyard on the bottom of its owner's library.

Flying
When this creature enters, venture into the dungeon. (Enter the first room or advance to the next room.)
At the beginning of combat on your turn, if you've completed a dungeon, up to one target creature becomes a Bird with base power and toughness 1/1 and flying until end of turn.

Flying
When this creature enters, it connives.

Level up

Vigilance
, : Copy target activated or triggered ability you control from a creature source. You may choose new targets for the copy. (Mana abilities can't be targeted.)

Morph
When this creature is turned face up, return target creature to its owner's hand.

Double team
Actualize — Echogoyfs's power is equal to the number of spells you've cast this game that weren't from your starting deck and its toughness is equal to that number plus 1.

Flash
This spell costs less to cast for each instant and sorcery card in your graveyard.
This creature enters tapped if it's not your turn.
When this creature enters, tap up to two target creatures.

When Edgar enters, draw a card for each artifact you control.
Two-Headed Coin — The first time you flip one or more coins each turn, those coins come up heads and you win those flips.

At the beginning of your upkeep, unless you sacrifice an Island, sacrifice this creature and it deals 6 damage to you.
This creature can't be blocked by red creatures.

Devoid
Flying
When this creature enters, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this token: Add ."

When this creature enters, it deals 1 damage to you.
: This creature gets +2/+0 until end of turn and deals 1 damage to you.

Flash
Flying
When this creature enters, you get (two energy counters).
At the beginning of your first main phase, tap this creature unless you pay .

Flash
Prowess

Soulbond
As long as this creature is paired with another creature, both creatures have hexproof.

Flying
If you would scry a number of cards, draw that many cards instead.
Partner

When this creature enters, you may exile an instant card from your hand.
, : Copy the exiled card. You may cast the copy without paying its mana cost. X is the mana value of the exiled card.

When this creature enters, draw a card, then discard a card.

Whenever Elrond or another creature you control enters, scry 1. If this is the second time this ability has resolved this turn, the Ring tempts you.

Whenever you activate an ability of a creature, draw a card. This ability triggers only once each turn.
: Exile up to two other target nonland permanents you control. Return those cards to the battlefield under their owner's control at the beginning of the next end step.

Prowess
Creatures with power less than this creature's power can't block it.

Whenever you cast a noncreature spell, this creature gets +1/+0 until end of turn and can't be blocked this turn.

Landfall — Whenever a land you control enters, choose one —
• Tap target creature an opponent controls.
• Untap target creature you control.

: Target creature can't be blocked this turn.

Whenever this creature attacks, scry 1.
Whenever you scry, tap up to X target nonland permanents, where X is the number of cards looked at while scrying this way.

, , Sacrifice this creature: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Whenever Emerald Collector deals combat damage to a player, draw a card.
When you draw your third card in a turn, conjure a card named Mox Emerald into your hand. This ability triggers only once.
: Emerald Collector has base power and toughness 4/4 until end of turn.

Flying, ward
This creature enters prepared.
Whenever this creature attacks, you may exile eight cards from your graveyard. If you do, this creature becomes prepared.

You may look at the top card of your library any time.
You may cast Merfolk spells from the top of your library.
Whenever you cast a Merfolk spell, you may pay . If you do, create a 1/1 blue Merfolk creature token.