Whenever Horizon Chamber becomes tapped, it deals 1 damage to you.
: Add to your mana pool. Return Horizon Chamber to its owner's hand.
: Horizon Chamber becomes a 1/1 white and blue Bird creature with flying until end of turn. It's still a land.
: Add 
to your mana pool. Return Horizon Chamber to its owner's hand.
: Horizon Chamber becomes a 1/1 white and blue Bird creature with flying until end of turn. It's still a land.
