The Dreamer Lost In The Pit

Changeling.
Any ability once a turn, it'll last till end of turn:
{r}: Reveal the top 3 cards of your library, put
them back at random. Spirits get Haste & +1/-3.
{b}: Each opponents discard a card at random,
you lose 2 life. Nightmares get Fear & +1/+1.
{u}: Untap a creature at random, draw a card &
discard a card. Illusions get Flying & -3/+1.
{2}: Non artifact creatures gain Changeling type.