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$0.25
As an additional cost to cast this spell, behold a Merfolk and exile it. (Exile a Merfolk you control or a Merfolk card from your hand.) Whenever this creature enters...
$0.25
'This creature can't be blocked.
Whenever another Merfolk you control enters, this creature gets +1/+1 until end of turn.
$0.50 – $1.00
Exhaust — {X}{U}{U}, {T}: Draw X cards. Put a +1/+1 counter on each Merfolk creature you control. (Activate each exhaust ability only once.)
$3.25 – $9.00
'Whenever this creature becomes tapped, you may create a 1/1 blue Merfolk Wizard creature token.
$1.75 – $2.75
'As this creature enters, choose a player.
This creature has protection from the chosen player.
$0.25
'Flying When this creature enters, reveal the top three cards of your library. Put all Island cards revealed this way into your hand and the rest on the bottom of...
$0.25 – $0.50
Flash
When this creature enters, untap each other Merfolk you control.
As long as you attacked with three or more Merfolk this turn, Merfolk you control get +1/+0.
$2.50 – $3.00
'Flying Each other Merfolk you control with a +1/+1 counter on it has flying. At the beginning of combat on your turn, target creature you control connives. (Draw a card,...
$0.25 – $0.50
As an additional cost to cast this spell, behold a Merfolk and exile it. (Exile a Merfolk you control or a Merfolk card from your hand.) Whenever this creature enters...
$4.50 – $6.00
'Other Merfolk get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)
$0.25
'Enchant land
Enchanted land is a 2/2 blue Elemental creature with flying. It's still a land.
When enchanted land dies, return that card to its owner's hand.