In that case, Yarus, Roar of the Old Gods's last ability triggers once for each player that face-down creatures you control dealt combat damage to, regardless of how many creatures were dealing that damage
If you've wanted to know the best way to take down a Rayquaza, there's a good chance you read one of my guides
If you need a refresher on what rotation is, how it affects you as a player, or how to look for cards that are rotating, check out the first Rotation for Dummies article
Step 8: Launch, Market, and Build a Community Successful launches rarely rely on ads alone
That means you can cast them on your opponents turn, in combat, and in response to any spell a player casts
Theres lots more to come in Year 2 and beyond, like the first ever World Championship for Yu-Gi-Oh