KING OF TOKYO POWER UP! EXPANSION

With King of Tokyo: Power Up. an expansion for the King of Tokyo base
game, after choosing a monster each player takes the eight Evolution
cards associated with that monster shuffles those cards and creates a
personal deck. At the end of a player's turn if she has three hearts she
draws one Evolution card and adds it to her hand; this is possible even
in Tokyo (when hearts are normally useless) and even if the hearts are
used for some other action such as healing. A player can reveal and play
an Evolution card at any time. Some Evolutions are temporary allowing a
one-time bonus while others are Permanent such as Gigazaur's Tail Sweep
which allows him to change one die to a 1 or 2 each turn. Each
Evolution card also identifies whether a monster is a Mutant Invader or
Robot and while not relevant for Power Up. this species identification
could come into play in future expansions. The rules for King of Tokyo:
Power Up. contain a few variants: Players start with a random Evolution
in play or draw two cards and choose the one they want or draft a set of
Evolutions prior to the start of play. However you play the goal of the
game remains the same: Score 20 points or be the last monster standing
amid the rubble of what was once Tokyo.