Fogwalker | Creature | Spirit | Skulk (This creature can't be blocked by creatures with greater power.)
When Fogwalker enters the battlefield, target creature an opponent controls doesn't untap during its controller's next untap step. | Seb McKinnon
2.0 LSV
Tattered Haunter | Creature | Spirit | Flying
Tattered Haunter can block only creatures with flying. | Nils Hamm
2.5 LSV