Ardulaer, Drow Matriarch

When Ardulaer, Drow Matriarch enters the battlefield all Elf and Spider creatures gain a 1/1 counter and "Sacrifice self: Ardulaer, Drow
Matriarch gains indestructible until end of turn."
All Elf and Spider creatures gain +1/+1 and
infect at the beginning of each combat phase.
My Clan, My Army — Whenever an Elf or Spider creature dies you may pay {b}{b} to gain one 2/2 Elf
and one 2/1 Spider black creature tokens.