You can think of it as a 5-mana phasing effect most of the time
After the Eldrazi Emrakrul twisted them, they became the herald of nightmares

Braids, Conjurer Adept Braids, Conjurer Adept | Illustration by Zoltan Boros & Gabor Szikszai Commander (1) Planeswalker (1) Creature (21) Archetype of Imagination Artisan of Kozilek Blightsteel Colossus Breaching Leviathan Bringer of the Blue Dawn Darksteel Colossus Emrakul, the Promised End Grozoth Inkwell Leviathan Jin-Gitaxias, Core Augur Kozilek, the Great Distortion Mulldrifter Nullstone Gargoyle Platinum Angel Platinum Emperion Siren Stormtamer Thassa, God of the Sea Torrential Gearhulk Tribute Mage Ulamog, the Infinite Gyre Void Winnower Instant (16) Brainstorm Counterspell Cyclonic Rift Disrupt Fact or Fiction Force of Will Frantic Search Mana Drain Mystical Tutor Negate Pact of Negation Pongify Pull from Tomorrow Rapid Hybridization Reality Shift Swan Song Sorcery (5) Blatant Thievery Clone Legion Compulsive Research Expropriate Treasure Cruise Enchantment (5) Back to Basics Mystic Remora Omniscience Propaganda Rhystic Study Artifact (14) Caged Sun Darksteel Forge Doubling Cube Extraplanar Lens Lightning Greaves Mindslaver Sensei's Divining Top Sol Ring The Immortal Sun The Magic Mirror Thought Vessel Thran Dynamo Treasure Map Vedalken Orrery Land (37) Ancient Tomb Island x29 Lonely Sandbar Myriad Landscape Reliquary Tower Riptide Laboratory Scrying Sheets Strip Mine Winding Canyons Braids, Conjurer Adept can be a scary commander to see on the board, and for good reason

If you can make your mana serve you well, instead of feeling helpless against awkward mana draws, you're well on your way to success.
Im doing this with EDH primarily in mind, assuming that everyone who wants to play Arclight Phoenix in Pioneer or the shock lands in Modern already have their copies
The cheaper of the two is Eternatus V DAA 116, running at just over $4 right now, giving you a big-hitter that can deliver over 120 damage in a single attack (or 240 damage if your opponents Pokmon is a VMAX)