Dr. Mundo, laboratory maniac

At the beggining of your upkeep lose 1 life.
Whenever you lose life Dr. Mundo, laboratory maniac gets +1/+1 until the end of the turn.
Dr. Mundo, laboratory maniac has hexproof while it's your turn.
Pay 2 lifes: Dr. Mundo, laboratory maniac gets trample and vigilance until the end of the turn.