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From $9.25
'Other Merfolk get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)
From $2.50
'Whenever this creature becomes tapped, you may create a 1/1 blue Merfolk Wizard creature token.
From $12.25
'Other Merfolk get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)
From $0.25
'Islandwalk (This creature can't be blocked as long as defending player controls an Island.)
Merfolk spells and Wizard spells you cast cost {1} less to cast.
From $10.75
'Champion a Merfolk (When this enters, sacrifice it unless you exile another Merfolk you control. When this leaves the battlefield, that card returns to the battlefield.) Whenever this creature deals...
From $0.25
'Draw two cards, then discard two cards.
Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
From $2.50
'Flash
Other Merfolk you control get +1/+1.
Sacrifice a Merfolk: Counter target noncreature spell unless its controller pays {1}.
'{T}: Draw a card, then discard a card.
'{T}: Draw a card, then discard a card.
'{T}: Draw a card, then discard a card.
'{T}: Draw a card, then discard a card.