Sea Gate Oracle

Merfolk Observer

Creature — Merfolk Rogue (2/1)

When Merfolk Observer enters the battlefield, look at the top card of target player's library.

Venerated Teacher

Creature — Human Wizard (2/2)

When Venerated Teacher enters the battlefield, put two level counters on each creature you control with level up.

Renegade Doppelganger

Creature — Shapeshifter (0/1)

Whenever another creature enters the battlefield under your control, you may have Renegade Doppelganger become a copy of that creature until end of turn. (If it does, it loses this ability for the rest of the turn.)

Dormant Gomazoa

Creature — Jellyfish (5/5)

Flying
Dormant Gomazoa enters the battlefield tapped.
Dormant Gomazoa doesn't untap during your untap step.
Whenever you become the target of a spell, you may untap Dormant Gomazoa.

Surrakar Spellblade

Creature — Surrakar (2/1)

Whenever you cast an instant or sorcery spell, you may put a charge counter on Surrakar Spellblade.
Whenever Surrakar Spellblade deals combat damage to a player, you may draw X cards, where X is the number of charge counters on it.

Coralhelm Commander

Creature — Merfolk Soldier (2/2)

Level up (: Put a level counter on this. Level up only as a sorcery.)
LEVEL 2-3
3/3
Flying
LEVEL 4+
4/4
Flying
Other Merfolk creatures you control get +1/+1.

Lighthouse Chronologist

Creature — Human Wizard (1/3)

Level up (: Put a level counter on this. Level up only as a sorcery.)
LEVEL 4-6
2/4
LEVEL 7+
3/5
At the beginning of each end step, if it's not your turn, take an extra turn after this one.

Merfolk Skyscout

Creature — Merfolk Scout (2/3)

Flying
Whenever Merfolk Skyscout attacks or blocks, untap target permanent.

Phantasmal Abomination

Creature — Illusion (5/5)

Defender
When Phantasmal Abomination becomes the target of a spell or ability, sacrifice it.

Champion's Drake

Creature — Drake (1/1)

Flying
Champion's Drake gets +3/+3 as long as you control a creature with three or more level counters on it.

Echo Mage

Creature — Human Wizard (2/3)

Level up (: Put a level counter on this. Level up only as a sorcery.)
LEVEL 2-3
2/4
, : Copy target instant or sorcery spell. You may choose new targets for the copy.
LEVEL 4+
2/5
, : Copy target instant or sorcery spell twice. You may choose new targets for the copies.

Guard Gomazoa

Creature — Jellyfish (1/3)

Defender, flying
Prevent all combat damage that would be dealt to Guard Gomazoa.

Hada Spy Patrol

Creature — Human Rogue (1/1)

Level up (: Put a level counter on this. Level up only as a sorcery.)
LEVEL 1-2
2/2
Hada Spy Patrol can't be blocked.
LEVEL 3+
3/3
Shroud (This creature can't be the target of spells or abilities.)
Hada Spy Patrol can't be blocked.

Halimar Wavewatch

Creature — Merfolk Soldier (0/3)

Level up (: Put a level counter on this. Level up only as a sorcery.)
LEVEL 1-4
0/6
LEVEL 5+
6/6
Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

Jwari Scuttler

Creature — Crab (2/3)

Ondu Giant

Creature — Giant Druid (2/4)

When Ondu Giant enters the battlefield, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Mul Daya Channelers

Creature — Elf Druid Shaman (2/2)

Play with the top card of your library revealed.
As long as the top card of your library is a creature card, Mul Daya Channelers gets +3/+3.
As long as the top card of your library is a land card, Mul Daya Channelers has ": Add two mana of any one color."

Cadaver Imp

Creature — Imp (1/1)

Flying
When Cadaver Imp enters the battlefield, you may return target creature card from your graveyard to your hand.

Kozilek's Predator

Creature — Eldrazi Drone (3/3)

When Kozilek's Predator enters the battlefield, create two 0/1 colorless Eldrazi Spawn creature tokens. They have "Sacrifice this creature: Add ."

Lone Missionary

Creature — Kor Monk (2/1)

When Lone Missionary enters the battlefield, you gain 4 life.