Talk:Overturn Demon Lord, Asmodai/@comment-34817248-20180228092105/@comment-32372672-20180228150340

But IT's activation is exactly the only timing where you can use the shield.

Overturn cannot be countered full stop... there's no ifs or buts. If someone activates an OT you can't cast or activate anything with COUNTER on it (though they can counter your counter with OT and your effect still goes off). Until there's an official rulling on it or an errata or something no one can be sure.

Batt'z OT would cancel it's own atk so it's moot, most other OTs and OKills activate outside of battle or in specific timings that are not very beneficial to activate in atk declaration... but not this one... and no rule EXPLICITLY says you can use a shield or not. Rules say play timing is after atk declaration, OT activates, OT can't be countered (RULES say this)... but if it can't be countered that's the only shield timing... no where says if it can or can't activate the rules go agains't the card.