Unfinished Timepiece

{1}{t}: Choose untap step, draw step, main phase,
or attack phase. Skip your next instance of the
chosen step or phase. When you do, put a
counter with its name on Unfinished Timepiece.
{t}, Sacrifice Unfinished Timepiece: If it had an
untap step counter, a draw step counter, a main
phase counter, and an attack phase counter on it,
take an extra turn after this one.