Irulan, Imperial Princess

[ +1 ]: Create three 1/1 Fremen creature tokens.
[ -3 ]: Destroy all creatures with power 4 or greater.
[ -7 ]: You get an emblem with "Creatures you control get +2/+2 and have flying."

Let the situation on Arrakis devolve into war.
You then bring peace. As a savior.