Magus of the Confluence

{5}, {t}, Sacrifice Magus of the Confluence:
Destroy all creatures if black mana was spent to
pay this cost. Destroy all enchantments if white
mana was spent to pay this cost. Destroy all
artifacts if green mana was spent to pay this cost. Destroy all planeswalkers if red mana was spent
to pay this cost. Each player discards their hand
and draws 7 cards if blue mana was spent
to pay this cost. If all 5 colors were spent to pay
this cost, you may put a permanent from your
hand onto the ba