Tibikali, the Crazed

At the beginning of your upkeep, you may
activate any of the non-mana activatable
abilities cast by other creatures and enchantments
you control on your last turn by paying
{u}{r}
{u}{r},{t}: Discard an instant or sorcery. Target
creature may cast that instant or sorcery's affect
as an activated ability still paying all the costs
and additionally tapping it.