Decade of True Love

At the beginning of your upkeep, you may choose
two target creatures. For as long as you control both
of them, they can’t attack or block. Whenever a creature chosen this way dies, put a love counter on Decade of True Love. At the beginning of your end step, if there are ten or more love counters on Decade of True Love, you win the game.

In a world of chaos, their hearts found a rhythm, echoing through the ages.