Happy Birthday

(Nonexistent mana costs can't be paid.)
As long as it's a permanent's birthday, its activated and/or triggered abilities activate and/or trigger an additional time whenever they are activated and/or triggered. If that permanent
is a creature, double its power and toughness. (A permanent's birthday is the day the card was created by its cardsmith. For example, this card's birthday (Happy Birthday's birthday) is February 25th.)