SoulStone

When SoulStone enters the battlefield, if there is already a card with a name SoulStone,
sacrifice this card
As a additional cost of this spell, sacrifice a creature.
If you control all 6 stones, sacrifice all 6 stones and
make an infinity gauntlet token.
Pitpocket (If a opponent dealt combat damage to you,
that opponent can sacrifice a creature and gain
control of this card)