Arena of Glory MH3/351

Set: Modern Horizons 3
Collector Code: MH3/351
Name: Arena of Glory
Type: Land
Oracle text: This land enters tapped unless you control a Mountain. {T}: Add {R}. {R}, {T}, Exert this land: Add {R}{R}. 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.)
Rarity: Rare