please give us (defensive) items that interact with turrets.

honestly, siege master should have been an item passive, for an early game item like etc. instead of a mastery.

other possibilities:

• an item that gives us the regenerating shield for ourselves and our turrets while near them, that inner turrets used to have
• an item active that manipulates turret shots to + 50% attack speed and splash damage, like the old fortify effect used to have
• an item active that lets us take direct control over a turret for a couple of seconds and allows us to chose its target
• consumable teleport platforms that can be deployed on destroyed turrets.
• an item that grants us a stacking combat buff for the rest of the game, for each turret we participated in destroying (or something like a stacking mountain drake buff per turret destroyed)

the last one could actually be worked into

• an active item that deploys a siege ballista like from the nexus siege mode

there are so many possibilities to make turrets more interactive.