Enchatments/Actives on items, that buff YOUR towers

^ People have suggested to change 's active to buff your tower. It's a great idea, but how about adding enchantments you can buy to certain items, of course with the change of stats. So not only tanks can buy items, to stop the enemy top + jgler taking down their turret at 6 min. after a gank.

I am also talking about different enchantments on items. Example: One enchantment could increase the resistances of your tower/damage reduction, another enchantment can increase it's damage, or it even increase it's attack speed, since there are no lasers anymore. Another enchantment can create an explosion around it, killing all minions and knocking enemies away (However, it doesn't do (much) dmg to champs). You can shield/heal your towers, hell, even make them invulnerable if you want to go full crazy.

This probably won't be added into the game, because it would create a clusterf*ck of "balance", but maybe this idea could lead to other ones.