Scourge of Fleets

When Scourge of Fleets enters the battlefield, return each creature your opponents control with toughness X or less to its owner’s hand, where X is the number of Islands you control.

Nullify

Counter target creature or Aura spell.

Fall of the Hammer

Target creature you control deals damage equal to its power to another target creature.

Griffin Dreamfinder

Flying
When Griffin Dreamfinder enters the battlefield, return target enchantment card from your graveyard to your hand.

Fated Conflagration

Fated Conflagration deals 5 damage to target creature or planeswalker. If it’s your turn, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Sudden Storm

Tap up to two target creatures. Those creatures don’t untap during their controllers’ next untap steps. Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Peak Eruption

Destroy target Mountain. Peak Eruption deals 3 damage to that land’s controller.

Griptide

Put target creature on top of its owner’s library.

Sealock Monster

Sealock Monster can’t attack unless defending player controls an Island.
: Monstrosity 3. (If this creature isn’t monstrous, put three +1/+1 counters on it and it becomes monstrous.)
When Sealock Monster becomes monstrous, target land becomes an Island in addition to its other types.