Sylas of Dregbourne

{x}{t}: Exile target instant or sorcery spell with mana value {x} and put a hijack counter on it.

Sylas of Dregbourne does not untap during your untap step, as long as there is a spell exiled with a hijack counter.

You may cast spells from exile with hijack counters on them. You may spend mana as though
it were mana of any color to cast these spells.