Hello everyone!

Let's continue with summoning spells. Upon reflection, I've noticed that the "troublesome" summons are the ones without mobility: they are summoned to a location, do the job, and become useless afterward.

• The Tesla coil has been rebalanced. I played a round with it, and it was a delight (a bit overpower).
• Skoll from a pawn can now vanish (in the spirit of giving it more mobility).
• Fire elemental has been replaced by Fire obelisk. This summon is intended to enhance the gameplay of special tiles.
• Toxic tree has been replaced by Toxic hydras. Tree is not useful. The Toxic Elemental isn't either, I need to rework it.
• All hydras has been reworked. The purpose of the spell is to have many hydras with low health points.
• Lightning pillar rebalanced: now fires with the queen by default.
• Water pillar: small nerf (bubbles can't start with more than 75 water).
• Fix: holy shroud UI.
• Fix: tile holy-lightning.