The Conflux on Alara

Target player draws five cards. Then, add ten mana of any color. Next, create The Maelstrom, a legendary 15/15 creature token that's all colors. Next, target player puts the
top twenty cards of their library into their graveyard. Finally, you gain 25 life.
Five mana colors. Five shards. Five worlds. Five philosophies. Five evil dreams of Bolas. All, one.