Leonova

{T}: Add {W}{W}{C} Leonova enters tapped unless you sacrifice a land. Cumulative upkeep — pay {W} and lose 1 life. {I} Supernova {/I} — When Leonova is destroyed, choose X different target creatures, where X is the amount of age counters on this permanent: exile target creature then return that creature under it’s owner’s control at the beginning of the next end step.