Path of Mettle // Metzali, Tower of Triumph

A creature that attacked and was removed from combat (such as by Spires of Orazca) still attacked, so it can be chosen at random.

Wotc — January 19, 2018

Players can't take actions between choosing the creature at random and destroying it.

Wotc — January 19, 2018

In a Two-Headed Giant game, Metzali's second ability causes the opposing team to lose 4 life.

Wotc — January 19, 2018

Path of Mettle's first ability deals 1 damage to each creature that doesn't have any of the four listed abilities. It doesn't deal 1 damage to each creature for each ability that creature doesn't have.

Wotc — January 19, 2018

For Path of Mettle's last ability to trigger, any two attacking creatures you control need to each have any one of the four listed abilities. They don't need to share one of those abilities. For example, attacking with Sun Sentinel (a creature with vigilance) and Fanatical Firebrand (a creature with haste) will cause Path of Mettle's ability to trigger, as will attacking with two Sun Sentinels.

Wotc — January 19, 2018

Metzali's last ability can be activated before blockers are chosen.

Wotc — January 19, 2018

Metzali's last ability can be activated after combat damage has been dealt. You'll choose a creature at random that attacked this turn and has survived combat damage.

Wotc — January 19, 2018

A creature with indestructible can be chosen at random. It won't be destroyed.

Wotc — January 19, 2018

A creature with hexproof can be chosen at random. It will be destroyed.

Wotc — January 19, 2018

A creature that was put onto the battlefield attacking didn't attack, so it can't be chosen at random.

Wotc — January 19, 2018