Tesharak, the Third Witch

Whenever another creature dies, you may pay {b/r}. If you do, put two bone counter on Tesharak.
Remove a bone counter from Tesharak: Choose one --
- Tesharak gets +1/+1 until end of turn.
- Tesharak gains first strike, deathtouch, or trample until end of turn.
- Sacrifice another creature and add {b} or {r} to your mana pool.