The one thing that Hedron Archive has going for it that I like is that you can also cast a Hangarback Walker the turn you cast it
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 Contested Cliffs
Gabriel Angelfire gains that ability until your next upkeep
By Invitation Only Pick a number Finally, we have a board wipe
Discard up to 3 P Energy from your Pokmon
This can easily get out of hand with little effort, and are amazing additions to most green decks