Arena of Glory
| 系列 | Modern Horizons 3 |
| 编号 | 351 |
| 稀有度 | rare |
| 效果 | 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.) |