Oasis of the Bitter End

{t}{x}: Add X+1 {u} to your mana pool.
{u}{u}{u}: Oasis of the Bitter End becomes a 3/3 Dragon Elemental creature with your choice of Hexproof, Indestructible or Menace until end of turn.
{u}{u}{u}{u}{u}: Each player exiles their hand then draws that many cards minus one. Draw a card. When Oasis of the Bitter End becomes a creature or gains an ability that effect doesn't end. (this effect doesn't end)