Wisp, Ethereal Grace

Shadow, Vigilance
Delirium — As long as there are four or more
card types among cards in your graveyard,
creatures your opponent's control can't attack
you or a planeswalker you control unless that
player pays 3 life for each of those creatures. If
they do, you gain that much life.
{w/b}: Wisp can block as though it didn't have
shadow.