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'Whenever another Elf you control enters, put a +1/+1 counter on Marwyn.
{T}: Add an amount of {G} equal to Marwyn's power.
'({T}: Add {G}.)
'Menace (This creature can't be blocked except by two or more creatures.)
When this creature enters, you may destroy target non-Elf creature whose power and toughness aren't equal.
'({T}: Add {G}.)
'({T}: Add {G}.)
'({T}: Add {G}.)
'You may look at the top card of your library any time. You may cast creature spells from the top of your library. {G}, {T}, Tap two untapped creatures you...
'({T}: Add {G}.)
'({T}: Add {G}.)
'({T}: Add {G}.)
'({T}: Add {G}.)
'Elves you control get +2/+0.