Dragonhawk, Fate's Tempest | Rite of Replication | Mirror Gallery

Cards

Cast
Rite of Replication with kicker by paying ({7} magic symbol) ({U} magic symbol) ({U} magic symbol) , creating five token copies of
Dragonhawk.
When the
Dragonhawk tokens enter the battlefield, they each trigger.
Resolve the first trigger, exiling a number of cards from the top of your library with the ability to play them until your next end step.
Repeat step 3 for each remaining trigger.
At the beginning of your end step, each
Dragonhawk token triggers, dealing 2 damage to each opponent for each card exiled by the
Dragonhawk tokens that were not played.

Assuming you control no other creatures with power 4 or greater, this combo can deal up to 60 damage to each opponent. This is reduced by 2 for each card you play that is exiled. For every additional creature you control with power 4 or greater, this combo deals up to an additional 10 damage per creature to each opponent.

Near-infinite damage.
Exile a portion of your library with the ability to play the exiled cards until end of turn.