The Magic Gatherer

Annhiliator 5
Reach
Deathtouch
When the magic gatherer enters the battefield,each player gives you their mana pool
When the magic gatherer enters the graveyard,you
no longer have to pay mana for spells
{10}{w}{u}{b}{r}{g},sacrifice the magic gatherer,each oponent's health is drained to 1,you gain 19 health