Time Travelling Knight

Flying, Haste
Time-Travelling {3}{u/r}{u/r} (You may cast this spell
without paying its casting cost, but if you do you get
an emblem with: "Pay {3}{u/r}{u/r} during your next
upkeep or you lose the game. If you pay the upkeep
destroy this emblem.")
"Once a time travelling knight who accidentally
broke reality went back in time to kill his former self
before he could break reality, which, then, of course,
broke reality again and again and again."