mtg commander ramp cards MTG: 10 Best Red For EDH Green Gets Big Mana Ramp

Otherworldly Gaze If you count Surveil spells as self-mill (and I do, given how rarely you see triggers that care exactly how cards end up getting from your library to the graveyard), then Otherworldly Gaze is as good a choice as any for the most consistent, efficient, no-bells-and-whistles version of the effect

The mana discount is sizeable, and the haste will often be incredible, especially in conjunction with attack triggers such as Raksasha Debaser, Balor, and Lord Xander, the Collector

Its Black Lotus with upside in decks with dredge that want to fill their graveyard

Finally, reshuffle your deck

Indestructible Hexproof is amazing

You can't remove more quest counters to multiply the effect