While there are a few cards like this, Gemstone Caverns is the only land that has this trait, and is one of the ways that players can win on the very first turn of the game under admittedly very specific circumstances
Lightning Bolt would still be one of reds best spells with that restriction, and this card is better
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Caller of the Claw and Vile Redeemer are especially well-suited for this deck, because they can be cast at the end of an especially activation-heavy turn to fill our board with tokens
The Most-Played Cards from March of the Machine March of the Machine , which released roughly two weeks before decklists were due, had a considerable impact on Standard
Well, accruing as much mana as possible is critical in the early game in Commander, and this Raptor certainly aids you on that front