RiderChaser, CorruptPursuer

Skulk (This creature can't be blocked by creatures with greater power.)
Outlast {1}{b/g} ({1}{b/g}, {t}: Put a +1/+1 counter on this creature. Outlast only as a sorcery.)
Partner. If you control another Elemental Soldier creature you gain "{x}{p/b}{p/g}, {ut}: Remove
X +1/+1 counters from Rider Chaser. Place an equal amount of -1/-1 counters on any number
of target creatures."