Other Merfolk creatures you control get +1/+1. Whenever you cast a Merfolk spell, you may tap or untap target permanent. 2/2
When Agent of Treachery enters, gain control of target permanent. At the beginning of your end step, if you control three or more permanents you don’t own, draw three cards.
Instant and sorcery spells you cast cost {1} less to cast. Whenever a spell or ability you control counters a spell, you may draw a card. If you do, discard a card.
Choose one or more — • Counter target spell. • Counter target activated or triggered ability. • Return target nonland permanent to its owner’s hand. • Create a token that’s a copy of target creature you control. • Target player draws a card.
When Treasure Mage enters the battlefield, you may search your library for an artifact card with converted mana cost 6 or greater, reveal that card, and put it into your hand. If you do, shuffle your library.
Whenever Grimoire Thief becomes tapped, remove the top three cards of target opponent's library from the game face down. You may look at cards removed from the game with Grimoire Thief. U, Sacrifice Grimoire Thief: Turn all cards removed from the game with Grimoire Thief face up. Counter all spells with those names.
Enchanted creature does not untap during its controller’s untap phase. During the upkeep of enchanted creature’s controller, that player may discard a card at random to untap that creature.
Svyelun of Sea and Sky has indestructible as long as you control at least two other Merfolk. Whenever Svyelun attacks, draw a card. Other Merfolk you control have ward 1. Whenever another Merfolk you control becomes the target of a spell or ability an opponent controls, counter it unless that player pays 1.)
Counter target instant or sorcery spell unless its controller pays {1}. Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)
Flying, indestructible Kefnet the Mindful can’t attack or block unless you have seven or more cards in hand. {3}{U}: Draw a card, then you may return a land you control to its owner’s hand. 5/5
Flash Creature cards you own that aren’t on the battlefield have flash. Each opponent can cast spells only any time they could cast a sorcery. 3/4
{U}{U}, Sacrifice a Wizard: Counter target spell. Morph {U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) 2/1
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