Corrupted Compatriot

Legion: Deal 1 damage to target player and gain 1 life.
Whenever this creature legions, create a 1/1 Black Demon Solider Berserker with "Whenever this is tapped due to the effect of legion, deal 1 damage to target creature".
The soldiers were glad to see their brother in arms return, but their joy quickly turned to fear when they saw that he did not return alone.