+Skulkin (9)
: Target white creature gains persist until end of turn. (When it dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)
: Target black creature gains wither until end of turn. (It deals damage to creatures in the form of -1/-1 counters.)
: Target green creature gets +1/+1 until end of turn.
: Target red creature gains haste until end of turn.
: Target blue creature gains shroud until end of turn. (It can't be the target of spells or abilities.)
When Skulking Fugitive becomes the target of a spell or ability, sacrifice it.
Flying
When Skulking Ghost becomes the target of a spell or ability, sacrifice it.
When Skulking Killer enters the battlefield, target creature an opponent controls gets -2/-2 until end of turn if that opponent controls no other creatures.
Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)
When Skulking Knight becomes the target of a spell or ability, sacrifice it.
Gatherer works better in the Companion app!