Horizon, Master Of Light

Horizon enters the battlefield with X master counters on it. Horizon's toughness is equal to the number of master counters on it. When Horizon dies, gain a life for each master counter on it. {t}: gain 3 life, then put a master counter on horizon, then if there are 10 or more master counters on Horizon you may exile it, if you do, you get an emblem with "whenever you gain life, gain twice that much life, whenever you lose life, loose half that much life instead (round up when needed)"