[CLASSIC Concept] Well, the Hydrosoul

I love pet mechanics and concepts! You have presented an interesting take on a pet mechanic, so let's look into it!

Your Hydrohomies last indefinitely. That's dope. Are they melee or ranged? If they are ranged, you probably won't be able to hit them and an enemy with your spells at the same time very often, but they are incredibly powerful! How do you balance it? Do they attack at the expense of their own bodies? Throwing out a few autos before having to sink into the ground again to recharge?

Do they have HP? Or are they invulnerable and can only be killed by straying too far from you? Both are cool. If they have HP, then you have created a champion who will occasionally summon a beefcake bodyguard to go kick butt, take names and tank for you, but who will eventually, and probably sooner than later, die. However, if they don't have HP, then boom! playstyle change! Your champion is now a lategame powerhouse, who will, over the course of the game, summon for himself a mighty army of twenty or maybe more Hydrohomies to run down his enemies! This is assuming that they do not die automatically when you recall. Think to yourself, which of these two playstyles would you rather have?

Will he automatically summon a Hydrohomie if his passive is off cooldown and something dies? Or do recently killed beings leave behind graves for a little, so that you can select when you want to summon a homie? Does it matter? Do different units grant more or less powerful Hydrohomies?

Wave of Loathing hits the targeted location and then bounces to one other unit. Maybe it doesn't? Maybe the beam of water explodes, dealing damage in an area, giving Well 20% mana back for every Hydrohomie he hits? Will good Well players actually be able to gain mana from using this spell? What if, if Hydrohomies have limited attacks, getting hit with this spell will refresh the number of autos they have left before they have to recharge?

Summon Geyser is cool, but the diameter is not wide enough to hit many homies. What if this spell had an inner and an outer circle, the inner knocking up and the outer simply dealing damage? Shields are cool, but what if instead, Hydrohomies hit by this spell became empowered, gaining extra attack speed?

Extremely awesome mechanical concept with Vortex Form here. Do vortexes affect enemy champion movement? As they are dormant, do they exist as a patch of harmless water? Are Hydrohomies affected by being in this water? Are Hydrohomies affected by being inside an active vortex? Maybe they get the movespeed buff instead of Well? Maybe their attacks now slow? Maybe they get extra range?

Wrath of The Immortals? dope. Is the Idol a giant Hydrohomie? That would be awesome. Here's the thing though. 10 seconds is an EXTREMELY long time. The longest channel in the game is technically Swain's ultimate, clocking in at 12 seconds, but he gets to move around. For something stationary, it's okay to cut it down to like 5 seconds, and then double the damage per second. A global cast range is probably a little too epic, and thematically it should probably be summoned pretty close to himself anyway. Maybe within like 500 units? Are his Hydrohomies really unaffected? What if the weren't? What if they get unlimited attacks for the duration of the ultimate? What if they get stronger? What if they split in half? What if they all combine to form the Idol itself, making it more powerful the more Hydrohomies he has??

Theorycraft with your champions, it's fun!

Did some balancing. Nerfed Well's passive and ult, so it no longer gives bonus armour and shreds enemy armour. Debuffs/bonuses are now only applied to MR.