Alter of the Chrono-Ichor

{1}{p/b}, {t}, Pay 3 life: Put a Blood-Alter token on
Alter of the Chrono-Ichor.
{p/b}{1}{p/b}, {t}, Remove 3 Blood-Alter tokens from
Alter of the Chrono-Ichor: Target player takes
an extra turn after this one.
Whenever a player takes an extra turn, put a
Blood-Alter token on Alter of the Chrono-Ichor.