Flash You may have Stunt Double enter as a copy of any creature on the battlefield. 0/0
Flying You have no maximum hand size. Whenever a creature token you control deals combat damage to a player, draw a card. 3/3
Whenever a player casts an instant or sorcery spell, each other player copies that spell. Each of those players may choose new targets for their copy.
Ninjutsu {2}{U}{U} ({2}{U}{U}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) Whenever Higure, the Still Wind deals combat damage to a player, you may search your library for a Ninja card, reveal it, put it into your hand, then shuffle. {2}: Target Ninja creature can’t be blocked this turn. 3/4
Flying {T}, Tap two untapped Birds you control: Return target permanent to its owner’s hand. 1/2
Flying When Narcomoeba is put into your graveyard from your library, you may put it onto the battlefield.
Level up 1 (1: Put a level counter on this. Level up only as a sorcery.) [Level 2-3] Flying [3/3] [Level 4+] Flying Other Merfolk creatures you control get +1/+1. [4/4]
Whenever you cast a nonlegendary creature spell with flying, you may copy it, except the copy is a 1/1 Spirit in addition to its other types. Do this only once each turn. (The copy becomes a token.) 3/3
Flash; convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature’s color.) Flying When Angel of Salvation enters, prevent the next 5 damage that would be dealt this turn to any number of targets, divided as you choose. 5/5
Enchant creature Enchanted creature has base power and toughness 8/8 and has “Whenever this creature attacks, you may tap target creature with power 8 or less.” Umbra armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)
Islandwalk (This creature can’t be blocked as long as defending player controls an Island.) Whenever Thada Adel, Acquisitor deals combat damage to a player, search that player’s library for an artifact card and exile it. Then that player shuffles. Until end of turn, you may play that card. 2/2
As Reflections of Littjara enters, choose a creature type. Whenever you cast a spell of the chosen type, copy that spell. (A copy of a permanent spell becomes a token.)
Flying When Keiga, the Tide Star dies, gain control of target creature. 5/5
Buyback {2} (You may pay an additional {2} as you cast this spell. If you do, put this card into your hand as it resolves.) Scry 3. (Look at the top three cards of your library, then put any number of them on the bottom and the rest on top in any order.)
Flash When Venser, Shaper Savant enters, return target spell or permanent to its owner’s hand. 2/2