Joraga Warcaller [Commander 2014] Warrior sacrifice Masticore unless you discard

sacrifice Masticore unless you discard a card

if this came under your control since the beginning of your last upkeep

Which tells us the way to go

Return them to the battlefield at the beginning of your upkeep on your turn X in the next game you play with one of your opponents in this game

Joraga Warcaller [Commander 2014] Warrior sacrifice Masticore unless you discardSet: Commander 2014 Type: Creature Elf Warrior Rarity: Rare Cost: {G} Multikicker {1}{G} (You may pay an additional {1}{G} any number of times as you cast this spell.) Joraga Warcaller enters the battlefield with a +1 +1 counter on it for each time it was kicked. Other Elf creatures you control get +1 +1 for each +1 +1 counter on Joraga Warcaller.