Champion Concept: Antoan, The Master of the Stone

I wanted to make a unique support, who doesn't deal damage, but the allies, who help, suffer too. I am not sure about what the lore should be yet. Feedback is appreciated.

PASSIVE - HELP THE WEAK: Every 10 minutes (the passive start to be active from the 10th minute) Antoan takes 2/3 of randomly selected tower HP, but give her 50% increased stats - armor, magic resist, attack damage and attack per second. If the selected tower don't get destroyed in 5 minutes, the cooldown on the passive is refunded. If both teams have equal number of towers, chances Antoab to select one of their towers is 50/50, but if one of the team has more towers, chance one of them to get destroyed is increased.

Q: ONE DOES NOT SIMPLY CROSS A STONE WALL: Antoan transfer him into a stone wall for 4/4,5/5/5,5/6 seconds. If ally or enemy champion pass through Antoan, he loses 1/3 of his HP. If the champion, who pass is a ally, he receives 10/15/20/25/30% increased gold income for 30 seconds. After Antoan returns to his normal form, he can choose where he can go in radius of 1000 units.

**W: POWER OF THE STONE: **Antoan shields himself with a stone and returns 7/9/11/13/15% of the incoming autoattacks damage as magic damage.

E - DEFEND WHAT'S YOURS If in a 15/13/11/10/9 seconds whole wave of allied minions dies, he receive a charge (can store up to 2 charges), that he can use to create a 2 stone caster minions or 1 mellee minion. He can use his two charges to create a stone canon minion. His creations gain the stats of allied minions, but can move through units, are immune to towers attacks and enemy minions, but enemy champions always deals 150% damage to them.

**R- DEAL WITH THE DEVIL: **Antoan give an allied champion the opportunity to use his summoner spells twice in the next 20 seconds, if they are off cooldown, and reset them, if they are on cooldown. Champion, who Antoan ulted, dies and respawns, he turns into stone for 20 seconds on the fountain and can't move.

I am not native English, so excuse my mistakes.