Leveler + Mystic Reflection + Alliance of Arms

Leveler

Mystic Reflection

Alliance of Arms

How it works

1. Cast Leveler by paying 5.
2. Leveler enters the battlefield, triggering itself, exiling your library.
3. Cast Mystic Reflection by paying 1, causing the next creatures or planeswalkers to enter the battlefield this turn to enter as copies of Leveler.
4. Cast Alliance of Arms by paying , paying at least 1 as it resolves and causing each player to create a number of Leveler tokens equal to the amount of mana paid.
5. Each of the token copies of Leveler enter the battlefield, triggering themselves, exiling their controllers' libraries.