Put a flood counter on target land. That land is an Island in addition to its other types for as long as it has a flood counter on it. If you control a Merfolk, draw a card.

: Add .

, , Sacrifice Blighted Cataract: Draw two cards.

Menace (This creature can't be blocked except by two or more creatures.)

Target creature gets +3/+1 and gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)

Creatures you control gain double strike until end of turn. (They deal both first-strike and regular combat damage.)

Draw three cards.

Return to their owners' hands all creatures with toughness less than or equal to the number of Islands you control.

Forgotten Cave enters tapped.

: Add .

Cycling (, Discard this card: Draw a card.)

Cycling (, Discard this card: Draw a card.)

When you cycle Gempalm Incinerator, you may have it deal X damage to target creature, where X is the number of Goblins on the battlefield.

, : Reveal cards from the top of your library until you reveal a land card. Goblin Charbelcher deals damage equal to the number of nonland cards revealed this way to any target. If the revealed land card was a Mountain, Goblin Charbelcher deals double that damage instead. Put the revealed cards on the bottom of your library in any order.

: Each creature attacks this turn if able.

Goblin Goon can't attack unless you control more creatures than defending player.

Goblin Goon can't block unless you control more creatures than attacking player.

Other Goblin creatures you control attack each combat if able.

At the beginning of combat on your turn, create a 1/1 red Goblin creature token with haste.

Whenever Goblin Rabblemaster attacks, it gets +1/+0 until end of turn for each other attacking Goblin.

Haste (This creature can attack and as soon as it comes under your control.)

When Goblin Ringleader enters, reveal the top four cards of your library. Put all Goblin cards revealed this way into your hand and the rest on the bottom of your library in any order.

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)

Create three 1/1 red Goblin creature tokens.

Create two 1/1 red Goblin creature tokens.

Other Merfolk creatures you control get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)

: Draw a card, then discard a card.

Flying

When Merfolk Wayfinder enters, reveal the top three cards of your library. Put all Island cards revealed this way into your hand and the rest on the bottom of your library in any order.

Draw X cards.

: Rootwater Hunter deals 1 damage to any target.

: Target Merfolk creature gets +1/+1 and gains islandwalk until end of turn. (It can't be blocked as long as defending player controls an Island.)

: Target land becomes an Island until end of turn.

When Tidal Courier enters, reveal the top four cards of your library. Put all Merfolk cards revealed this way into your hand and the rest on the bottom of your library in any order.

: Tidal Courier gains flying until end of turn.

Create a 5/5 blue Wall creature token with defender. Sacrifice it at the beginning of the next end step.

Up to two target creatures each get +0/+3 until end of turn. Untap those creatures. At this turn's next end of combat, tap each creature that was blocked by one of those creatures this turn and it doesn't untap during its controller's next untap step.

Double strike

Whenever Warren Instigator deals damage to an opponent, you may put a Goblin creature card from your hand onto the battlefield.