Heartstone of Magic

This card may not leave the battlefield and can't
be countered. You have no hand size.
Escalate {0} and exile a land you control.
{t}: Choose one or more—
•place a card.
•a person joins the game.
•target player joins your team
{bull}swap the deck, hand, graveyard, exile pile and battlefield of target player with a deck of your
choice.