This lets you hold up mana, react to your opponents plays, and deploy threats at instant speed
For example, the very bottom number is especially important to the Aetherworks Marvel example because it not only include the 33.62% of hands that include exactly one Marvel but also the (roughly) 6% of hands that have two or more Aetherworks Marvels, which raises the percentage up to just under 40%
Arwen, Mortal Queen Arwen, Mortal Queen provides a neat pocket of value
to explain, while there are 204 cards designated for Archazias Island , there are actually 222 cards overall, with Enchanted Rare cards numbered from 205-222
Rev, Tithe Extractor, Gonti, Night Minister and Shirei, Shizos Caretaker all love this one, but I especially like it in Gix, Yawgmoth Praetor
Ruric Thar, the Unbowed In 60-card Magic , some of the most powerful cards tend to be noncreature spells, and the same is true for Commander