This volcano plays many characters, producing everything from expansive lava flows to basaltic Plinian eruptions but mostly mundane lava flows or irrelevant explosions For me, Grimsvotn holds a special place among other volcanoes, ranking among my top three candidates likely to produce a caldera-forming eruption within the next decade, alongside Ioto and Chiles-Cerro Negro. If Grimsvotn were to produce a caldera-forming eruption, it would likely involve reactivated magma, as the ratio of intruded magma to the chamber volume is remarkably high. If a conventional magma intrusion does not develop into an eruption, it is plausible that Grimsvotn may produce a ring dyke or a larger traditional dyke, setting the stage for a more significant eruption.