Until end of turn, creatures you control get +2/+2 and gain “Whenever this creature deals combat damage to a player or planeswalker, destroy target artifact or enchantment defending player controls.”
"If we die, we die. But we cannot let him win."
—Ajani Goldmane
Storm the Citadel affects only creatures you control at the time it resolves. Creatures you begin to control later in the turn won’t get +2/+2 or gain the triggered ability.
03-05-2019
wotc
If a creature is attacking a planeswalker, the controller of the planeswalker is the defending player.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.