Target creature gets -1/-1 until end of turn for each Swamp you control.
"On a failed save, target creature takes 8d8 necrotic damage."
Illustrated by Cabrol · Secret Lair Drop · #1793
There are no rulings for Defile.
Target creature gets +1/+0 until end of turn for each artifact you control.
Creatures you control get +1/+0 until end of turn.
Until end of turn, target creature you control gets +1/+1 and target creature an opponent controls gets -1/-1.
Target creature gets -2/-2 until end of turn. It gets an additional -1/-1 until end of turn for each Desert you control.
Target creature gets -1/-1 until end of turn. If you control a Faerie, draw a card.
Target creature gets +2/-2 until end of turn.