These show off the planes of Aetherdrift from the perspective of one of the racers, giving you a new way of looking at the action
Urzas ability works well in Humans, as the activated ability uses strictly colorless mana, and while the ability does cost five mana, Aether Vial can be used to help pay that cost, meaning Humans has 23 mana sources to activate the ability if you count fifteen non-Ancient Ziggurat Lands, four Noble Hierarchs, and four Aether Vials
An activated ability is basically an ability that you have complete control over
Japanese Japanese Bulbasaur Intro Pack SPOILER: Click to show 600800 165 KB The Japanese Intro Pack was, as it name implies, an introduction for new players to the TCG
Boon: MTG Arena Boon is a digital-only mechanic that gives the next spell you cast a boon when the mechanic's requirement is met
In Commander, where your life starts at 40, Serra Ascendant is almost always a one-mana 6/6 Flying, Lifelink beater that your opponents always seem to start with on turn one