Mortify

Until end of turn, creatures you control get +1/+1 and creatures your opponents control get -1/-1.

Target creature gets +2/+1 and gains trample until end of turn.

Enchant creature Enchanted creature has indestructible. Whenever a creature enters, you may attach this Aura to that creature.

Other Merfolk creatures you control get +1/+1. T: Target Merfolk creature can't be blocked this turn.

Enchant creature with mana value 2 or less You control enchanted creature.

When this creature enters, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Return six target nonland permanents to their owners' hands.