Frog Boiler is a Very Heavy Spell

I am looking for a spell to act like a tower and this is of course according to physical damage as most spells act like assistant tools to other towers or just hit a group of fiends for a short duration and then it disappear and this is what I do not see in Frog Bioler.

If you look at their stats from the beginning you could see that it act like a tower and you will not doubt that it is a tower but lets see what it can do and how you could benefit from a spell like this as it has a minimum HP of Fiends to be triggered and it is about 1000.

Frog Boiler can be used 3 times in the battle and with a radius of 100 and a duration of 8 but it has two specific features that distinguishes it from other spells and they are damage multiplier of 1.1 and physical damage of 840 and this is amazing for just level 1.

If you want a level 10 Frog Boiler you could see that it has a minimum HP to be triggered up to 43k and can be used 12 times in the battle and this is a huge number but do no surprised as it would have a physical damage of 250k.