The 10 damage is irrelevant, but preventing your opponent from playing Item cards from their hand is almost game breakingly good
Aetherworks Marvel defined its Standard format when it was used to put in play one of the best of the Eldrazi titans, Ulamog, the Ceaseless Hunger, ahead of time, effectively ending the game on the spot, but its a bit more of a roulette wheel in Commander
Kappa Tech-Wrecker is impactful when ninjutsud in for the guaranteed trigger, and tricky to block well after that
Then, anytime you are tempted by the ring, you can discard your hand, both filling your graveyard with fuel for explosive later turns, and keeping your hand fresh with new cards
Does this mean you can trade cards in Arena the make things easier