Life Cost 0 You can use the skill when your Life Points are 1000 or less. You do not have to spend Life Points to activate a card until your opponent's next turn ends. You can only use the skill once per Duel.
Life Cost 0 is the kind of skill that's either going to be broken or useless. There's no real middleground. Nobody's running the skill just so they can use that Autonomous Action Unit they topdecked at 200 LP. I don't see how nerfing the skill is a problem. It really only affects Stein and Destructotron, and cards like Cosmic Cyclone you're running in your Deck just to TRIGGER Life Cost 0.
I summoned him with 8000+ life points thanks to Aegis of Gaia and wouldn’t let me summon my Thunder Giant, Why?
It happened to me, too. He got Hey Trunade! (which I like to call, Hey it's time to die now! when played with cyberstein) on his very first turn, after that, life cost 0 with two big fusions and RIP for me.
You have to be very suspicious of any deck played by Odion / Tea / Espa which plays super defensively. The moment you see a Kuriboh, Crystal Seer, Dark World Dealing or Into the Void, you know you are playing a Cyber Stein deck. There isn't always much you can do to win though. You can try to deck out, but they usually have ways to reduce their own life points. Play a single monster and wait.
Limit this garbage card. It amazes me how this tcg banned card is only in duel links. With the starting life points at 5000 and life cost 0 Tea Stein just curbstomps. Yes this can be countered easily with the right card but that doesn't make this idiotic card any less annoying. Limit this card to 1-2 for goodness sake.