Leyline of Blood Wishes

You may exile a 5 color card from your hand
rather than pay this card mana cost.
If this card is in your opening hand, you may
begin the game with it on the battlefield.
You and your permanents have hexproof.
Opponent's can only cast one spell each turn.
If a card would be put into an opponent's
graveyard from anywhere, exile it instead.
Spells you control can't be countered.