Your opponents can choose not to pay to attack with a creature that attacks "if able." If there's no other player or planeswalker to attack, that creature simply doesn't attack
Those that do make artifacts like Pitiless Plunderer up the value of this for sure and it is more than just a good card without any
Depending on how your local game store handles things, you might have to specifically sign up to attend or just show up on the day, but typically participation sees you purchase a special pre-release pack which will give you a life counter dice, six booster packs from the set, and a special promo card
Creating infinite tokens with Sliver Queen or cards that produce tokens exclusively with colorless mana like Myr Matrix is the most common line of play, but the sheer amount of mana you get from tapping a commander like Krenko, Mob Boss can also let you spin up a lethal burn spell like Comet Storm with ease
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