Acqua Magica Continuous Spell
If a WATER Spellcaster monster is Summoned to your field: You can Special Summon 1 Aqua monster from your Deck or GY whose ATK is lower than that monster's ATK. If that WATER Spellcaster would be destroyed, you can destroy the monster Summoned by this effect instead (even if this card leaves the field). You can banish this card from your GY: Send 1 WATER Spellcaster from your hand or Deck to the GY, and if you do, Special Summon 1 Aqua monster from your Deck or GY whose Level is equal or lower than the Level of the sent monster +1. It cannot be destroyed this turn. You can only use each effect of "Acqua Magica" once per turn.
Semi-generic support for all WATER Spellcasters, basically. Ideally it takes 1~2 Aqua techs to take advantage of it, with the intent to keep it as a compact engine. Some archetypes inherently have WATER Spellcasters and Aquas, namely Ice Barriers.
Thoughts?