Equipped creature gets +X/+Y, where X is the first chosen result and Y is the second
Thats a lot, and lets look at the breakdown for how many of each type there are in that slot
Choose a Background (You can have a Background as a second commander.) Choose a Background (You can have a Background as a second commander.) Legendary Creature - Human Wizard Mizzix's Mastery Exile target card that's an instant or sorcery from your graveyard
And lets be honest: Who among us hasnt been bailed out by using D-Tutor as a Sylvan Scrying to hit our third land drop
Card not found (rare), on the other hand, won a Pro Tour in the hands of Gerry Thompson as a part of a Monoblack Zombie deck, which was able to abuse both of its abilities to gain a lot of advantage
Aeve uses storm as both a payoff for casting several spells, and as a self-contained lord effect