Morale

Attacking creatures get +1/+1 until end of turn.

Yotian Soldier

Mishra's Factory

{T}: Add {C}.
{1}: This land becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land.
{T}: Target Assembly-Worker creature gets +1/+1 until end of turn.

Oasis

{T}: Prevent the next 1 damage that would be dealt to target creature this turn.

Strip Mine

{T}: Add {C}.
{T}, Sacrifice this land: Destroy target land.

Plains

Island

Northern Paladin

{W}{W}, {T}: Destroy target black permanent.

Fourth Edition