All creatures get -1/-1 until end of turn for each Swamp you control.
Mana cost
2
B
B
Mana value
4
Printings
From
$1.17
EDHREC rank
#2415
Buy
Formats
Modern
Legal
Legacy
Legal
Vintage
Legal
Commander
Legal
Rulings
1 Jul 2012
The effect is based on the number of Swamps you control when Mutilate resolves. Only creatures on the battlefield at that time will be affected. The effect won't change later in the turn, even if the number of Swamps you control changes.