Each Curse’s ability triggers only once, no matter how many creatures are attacking the enchanted player.
25-08-2017
wotc
A player is attacking another player if they control a creature that’s attacking that player. If no creatures are attacking the enchanted player as a Curse’s ability resolves (most likely because they’ve left the battlefield), only the Curse’s controller performs its actions.
25-08-2017
wotc
If you enchant yourself with one of these Curses, you’ll get its effects whenever another player attacks you.
25-08-2017
wotc
The triggered ability of these Curses won’t trigger if only a planeswalker controlled by the enchanted player is attacked.
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.