Arachne the Weaver

Infect, haste, drain (When this creature dealt damage it gets +0/+X until end of turn where X is the amount of damage dealt by this creature.)
Whenever a creature blocks Arachne, tap that creature and spawn 2 1/1 green spider creature tokens banded with Arachne and attacking.
{5}{b}{b}: Exile Arachne the Weaver and return it to the battlefield at the end step.