In that way, Rift Bolt is much-needed redundancy for decks looking to burn the opponent directly
Mana Crystals are the premium in-game currency
Youre less likely to flood or get mana-screwed if you play your cards right

Abzan Falconer Abzan Skycaptain Adanto Vanguard Adarkar Sentinel Adherent of Hope Advance Scout Aegis of the Gods Aerial Caravan Aerial Extortionist Aerial Responder Aerie Auxiliary Aeronaut Cavalry Affa Protector Ageless Guardian Agent Bishop, Man in Black Agent Venom Agrus Kos, Eternal Soldier Agrus Kos, Wojek Veteran Ainok Bond-Kin Air Marshal Ajani's Chosen Ajani's Comrade Ajani's Pridemate Akiri, Line-Slinger Akrasan Squire Akroan Crusader Akroan Hoplite Akroan Jailer Akroan Phalanx Akroan Sergeant Akroan Skyguard Akron Legionnaire Alaborn Grenadier Alaborn Musketeer Alaborn Trooper Alaborn Zealot Alert Shu Infantry Alistair, the Brigadier Ambush Paratrooper Ampryn Tactician Anafenza, Kin-Tree Spirit Anafenza, Unyielding Lineage Anafenza, the Foremost Anax and Cymede Angelfire Crusader Angelic Quartermaster Anim Pakal, Thousandth Moon Aradesh, the Founder Aragorn, Hornburg Hero Arcbound Javelineer Arcbound Shikari Archetype of Courage Ardent Militia Ardent Recruit Ardent Soldier Argivian Phalanx Armament Corps Armament Master Armored Guardian Armory Guard Ascending Aven Asphodel Wanderer Atlantean Cavalry Attendant of Vraska Auriok Bladewarden Auriok Edgewright Auriok Glaivemaster Auriok Salvagers Auriok Steelshaper Auriok Sunchaser Auriok Survivors Auton Soldier

This ability also only gets more powerful with the more players in the game, so Commander decks can make good use of this card