Diabolic Sliver (Black Sliver with landfall)

[Volume]

Diabolic Sliver - B
Creature -- Sliver
Landfall - Whenever a land enters the battlefield under your control, if Diabolic sliver dealt combat damage this turn, you may have target player discard 2 cards.
1/2

[Arix]

Black doesn't get to be that efficient, at all. This would be at the very least a 1/1 for 1B, though more likely 2/1 or 2/2 for 3B or 2BB.

[guyarney]

Diabolic Sliver - B
Creature -- Sliver
Landfall - Whenever a land enters the battlefield under your control, if Diabolic sliver dealt combat damage this turn, you may have target player discard 2 cards.
1/2

A Sliver isn't a Sliver unless it shares its ability - save the five color ones.