Doggo

Double strike,haste
If the SOUL mode is blue, doggo loses double strike.
{t}{u}: doggo loses an ability from haste,trample,vigilance, or Deathtouch.
Whenever doggo loses an ability, doggo gains an ability from either haste or trample and you may cast a spell with converted mana cost 3 or less from your graveyard without paying its mana cost.