What he meant is the soulstone from the warlock in WoW. It's an item the warlock can summon and cast on a player (doesn't matter if himself or any other player) who gets a "buff". When this player dies, he can revive instantly by clicking accept. It's somewhat of a battlerrezz. When the warlock doesn't cast this stone on someone but keeps the stone in his inventory he can cast this stone on a dead player, then it's a battlerezz with casttime. I think the OP want to change the battlerezz of the sorc/sage into this. P.S.: please be kind because of my grammer, I'm no native speaker