Nashkut, The Bleeding Sands

Opponents can't gain life.
Indestructible.
{t}, If a player lost life this turn, add {b} or {r} mana to your manapool. Creatures cast using
this mana have haste and indestructible until end
of turn. Otherwise add {c} to your mana pool.
Pay 2 life: Untap Nashkut, The Bleeding Sands. Activate only three times per turn.