High Hrothgar

When High Hrothgar enters the battlefield,
choose Dragon or Dragonborn.
{2}{t}: Add {b}{r}{g}, use this mana only to cast
Dragon spells.
{2}{t}: Creatures you control get +2/+0 and gain
flying and menace until end of turn. Activate
this ability only if you chose Dragon.
{2}{t}: Creatures you control get +2/+0 and gain
first strike and reach until end of turn. Activate
this ability only if you chose Dragonborn.