Tarel, Ruptured Memories

Deathtouch, haste
{b}{r}: All creatures able to block Tarel,
Ruptured Memories do so.
Whenever Tarel becomes blocked, add {b/r} to
your mana pool for each creature blocking it.
Until end of turn, this mana doesn't empty
from your mana pool as steps and phases end.
"Memories are for the living."