Things get a bit more complicated once you throw other creatures into the mix. Let’s say you control Loyal Pegasus, who can’t attack or block alone, and a Traveling Philosopher. If Shipwreck Siren uses its ability to force Loyal Pegasus to attack, you’re required to attack with the Philosopher as well, since sending additional creatures into combat isn’t a cost that disqualifies the phrase “if able.” On the other hand, suppose you’re drafting Conspiracy and you’ve somehow picked up two Cogwork Trackers, but one of your opponents has a Silent Arbiter. In this case, you can’t fulfill both requirements at once, so you pick one and ignore the other. If both of your Trackers are required to attack different players, you’ll get to pick which opponent you’re required to attack this turn.
Today’s Rules Tip written by Jen Wong