Destructive Haeverauk

Indestructible, Hexproof
Whenever Destructive Haeverauk attacks, all creatures able to block it do so.
If any creature were to be destroyed this turn,
deal {x} damage to target player.
{t}, Add {u/r} to your mana pool.
It doesn't care for eldrazi or planeswalkers, it only
sees obstacles to be eaten.