For permanent ramp, Mana Geyser is awesome and enables infinite mana loops with cards like Reiterate
You may cast any number of legendary instants in a turn, and your deck may contain any number of legendary cards (but no more than four of any with the same name)
Boggart Cursecrafter Boltwave Booby Trap Boomerang, Blade Flinger Brallin, Skyshark Rider Brazen Cannonade Brazen Dwarf Breath of Malfegor Brimstone Trebuchet Brimstone Vandal Broodbirth Viper Bulwark Burning Cinder Fury of Crimson Chaos Fire Burning of Xinye Cabal Paladin Cartouche of Strength Catti-brie of Mithral Hall Cavalier of Flame Cavern-Hoard Dragon Cerebral Eruption Chainer's Torment Champion of the Path Chandra's Ignition Chandra, Awakened Inferno Chandra, Flame's Catalyst Chandra, Legacy of Fire Chandra, Pyrogenius Chandra, Roaring Flame Chandra, Torch of Defiance Chelonian Tackle Circle of Power Collective Defiance Colossus of the Blood Age Commodore Guff Conclave Evangelist
You can choose to cast that card for free or put it and the revealed cards at the bottom of your library, effectively giving you two cards for the price of one
Sacrifice your creatures for profit while adding Experience counters to Meren, who reanimates bigger and bigger creatures every turn
Moreover, its most-improved card, Fable of the Mirror-Breaker, is the dictionary definiton for a breakout Cube success