Deepwood Infiltrators

If an opponent controls a Forest and you control
a Swamp, you may cast this spell without paying
its mana cost.
{b}: If an opponent controls a Forest and you
control a Swamp, you may cast this spell without
paying its mana cost.
Mask (Pay 2 Life) (You may cast this face down
as a 2/2 creature for {3}. Each player may rearrange
their creatures as other players look away. Turn it
face up any time for its Mask cost.)