Arena of Glory [Modern Horizons 3 Prerelease Promos] Token Creature Looking for the perfect eraser

Looking for the perfect eraser for a new project or a new class

Set: The List Type: Artifact Rarity: Rare Cost: {4} You may cast spells as though they had flash

"So long as men retain free will

nature exploited his war machines to renew itself

you may add X mana of any one color

Arena of Glory [Modern Horizons 3 Prerelease Promos] Token Creature Looking for the perfect eraserSet: Modern Horizons 3 Prerelease Promos Type: Land Rarity: Rare Arena of Glory enters the battlefield tapped unless you control a mountain. T: Add R. R, T, Exert Arena of Glory: Add RR. If that mana is spent on a creature spell, it gains haste until end of turn. (An exerted permanent won't untap during your next untap step.