Halarkhalm, God Ender

Haste, Deathtouch, Soulbond (When a creature
with Soulbond enters the battlefield chose another
creature on the battlefield to be its bond. Whenever the creature with Soulbond would die, the bonded
creature's controller sacrifices it instead. When the
bonded creature leaves the battlefield chose another creature to be it's bond. If no creature's remain,
sacrifice it.)
Players cannot cast permanent spells.
Sacrifice a creature: Halarkhalm gets two +1/+1 counters.