Asogoth, The Absorber

Indestructible, Vigilance, Deathtouch
This creature must be blocked if able.
If this creature were to deal lethal damage to
another creature, mutate that creature onto
Asogoth, The Absorber.
Whenever Asogoth, The Absorber has merged
with 5 other creatures, put them in their owner's graveyard. Then transform Asogoth, The
Absorber.