For the record, this card has been banned in the TCG since its inception. It most definitely is an OP card and combatting it with someone using Tea Gardner is near impossible if you aren't built to destroy OP monsters with card effects (Michizure, Hane-hane, ect.) Here is my thoughts on why this card is even in the game. Since you naturally start with 4000LP, they probably figured cyber-stein isn't as OP in duel links as it is in the TCG, where you start with 8000LP. However, with Tea's Life Cost 0 ability, you essentially take away the crippling effect that comes with using Cyber-stein normally, and combined with LP regen cards like Supremacy Berry or Dian Keto Cure Master, and you basically are giving away victory to the person who carries 3 cyber-steins in their deck and multiple 3200+ ATK fusion monsters but nary a single polymerization or fusion gate in their deck. It really is unstoppable and the only way to combat it is pray to God the opponent started with a 🔥 hand. Anyone defending this card as not OP has obviously never played the actual TCG, especially in advanced format. The least they could do is limit it but it doesn't look like they will any time soon.