Our wizards in a campaign might be about to face off against mermen, sea monsters, and all sorts of aquatic nasties. I’m pondering spells to defeat them. Given many aquatic creatures don’t do well on land I thought to throw them into the beach.
Strand the Whale Upon the Shore
Rego Aquam 40, R: Voice, D: Concentration, T: Group
This spell creates powerful many currents and jets of water under the control of the caster, which allow them to move waterborne creatures and objects against their will, including ejecting them from the ocean upon the beach. The spell can affect a very large part of a greater water source.
(Base 5 for controlling in a violent way, +2 Voice, +1 Conc, +2 Group, +2 size)
Many other new spells for Ars Magica can be found in my grimoire.