TimeStone

When PowerStone enters the battlefield, if there is
a card with the name PowerStone, sacrifice this card
As a additional cost for this spell, sacrifice a creature
If you control 6 stones, sacrifice all of them and
make an infinity gauntlet token.
Pitpocket(If an opponent deals combat damage to you,
that player could sacrifice a creature and gain control of this card)
{t}, Pay 5 life: Take an extra turn.