Skeleton Scavengers enters the battlefield with a +1/+1 counter on it.
Pay for each +1/+1 counter on Skeleton Scavengers: Regenerate Skeleton Scavengers. When it regenerates this way, put a +1/+1 counter on it.

: Target creature with flying gets -1/-1 until end of turn.

Flying, vigilance

: Add .

: Create a 1/1 colorless Sliver creature token.

Destroy target blocked creature.

Shadow (This creature can block or be blocked by only creatures with shadow.)
Whenever Soltari Champion attacks, other creatures you control get +1/+1 until end of turn.

Spike Breeder enters the battlefield with three +1/+1 counters on it.
, Remove a +1/+1 counter from Spike Breeder: Put a +1/+1 counter on target creature.
, Remove a +1/+1 counter from Spike Breeder: Create a 1/1 green Spike creature token.

Spike Colony enters the battlefield with four +1/+1 counters on it.
, Remove a +1/+1 counter from Spike Colony: Put a +1/+1 counter on target creature.

Spike Feeder enters the battlefield with two +1/+1 counters on it.
, Remove a +1/+1 counter from Spike Feeder: Put a +1/+1 counter on target creature.
Remove a +1/+1 counter from Spike Feeder: You gain 2 life.

Spike Soldier enters the battlefield with three +1/+1 counters on it.
, Remove a +1/+1 counter from Spike Soldier: Put a +1/+1 counter on target creature.
Remove a +1/+1 counter from Spike Soldier: Spike Soldier gets +2/+2 until end of turn.

Spike Worker enters the battlefield with two +1/+1 counters on it.
, Remove a +1/+1 counter from Spike Worker: Put a +1/+1 counter on target creature.

Flying
At the beginning of your upkeep, sacrifice Spindrift Drake unless you pay .

Whenever a Sliver becomes blocked, that Sliver gets +1/+1 until end of turn for each creature blocking it.

Flying
: The next 1 damage that would be dealt to Spirit en-Kor this turn is dealt to target creature you control instead.

Spitting Hydra enters the battlefield with four +1/+1 counters on it.
, Remove a +1/+1 counter from Spitting Hydra: It deals 1 damage to target creature.

, Sacrifice a creature: Destroy target nonblack creature.

Other black creatures get -1/-1.

: Target legendary creature gets +2/+2 until end of turn.