Syvore, God of Punishment

Flying, Deathtouch, Indestructible
Whenever a player takes an extra turn or takes an additional phase, that player loses half their life,
exiles half their deck, and discards half their
cards, each rounded down.
{4}{b}{b}{b}: Target players takes an extra turn after
this one.
{4}{b}{b}{b}: Target player takes an extra phase of
your choice after the current phase.