Ekko, Time Shatterer

At the beginning of your upkeep, target instant or
sorcery spell in your graveyard gains flashback
until end of turn
If Ekko would die, instead you may Exile him and create a Rewind counter
{x}, Pay X life: If Ekko, Time Shatterer is exiled,
return him to the battlefield with Haste until
end of turn. X is equal to the number of Rewind
counters you control