All Legendary Creature gain Legendary Action Point(s). This amount is equal to the number of Player Characters (not summons) minus one.
Example: 4 Player Characters are in a party, a Legendary Creature would gain 3 Legendary Action Point(s).
These Legendary Action Point(s) are ADDED to the standard Action Point(s) (typically 3) that a creature has.
A Legendary Creature can spend a number of Action Point(s) using ANY Spell or Ability AFTER ANY creature's Turn has ended.
All Legendary Creatures gain Legendary Resistance, and can use 2 Action Point(s) to succeed a Contesting Roll (no Reaction is used).
A can only spend 3 (unless otherwise set) Action Point(s) on its Turn. Whenever it uses Legendary Action Point(s) this uses its total Action Point(s) it can use for that Turn.