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.
Just like the usual Cyber-Stein decks, use its effect once you lowered your HP to 1000, and use your skill Life Cost 0 to special summon Blue-Eyes Ultimate Dragon or any other fusion monster from your extra deck. Although not as powerful as Blue-Eyes Ultimate Dragon in terms of stats, other fusion monsters in this deck have great effects that also make them worth summoning.
Arcana Knight Joker has amazing stats and can protect himself from any card effect as long as you can discard a card of the same type from your hand.
Blade Skater gains a lot of powerful effects depending on the number of monsters your opponent controls.
Use Cosmic Cyclone to remove from play any spell/trap card on the field. Use this during the turn you activate Life Cost 0 so you can activate it for free. Conversely you can use this to reduce your LP helping you activate Life Cost 0.
Activate Anti-Magic Arrows at the start of the battle phase to protect yourself from your opponent's backrow. Using this at the right time can help you to OTK your opponent.
Normal summon Destructotron to clear the spell/trap card zone of your opponent by lowering your own LP enough to activate Cyber-Stein's effect, you can also use Pyschokinesis to clear your opponent's monster.
Once you've successfully cleared your opponent's field for any potential threat to your combo, you can now activate your spell Double Summon and normal summon Cyber-Stein.
Where the is a triple abyssal designator?
And why not using thing like white elefant gift (works on fusion monsters) or maybe gift of the martyr?
Cyberstein could summon up to the limit of card in your extra deck when you activate life cost 0, so no matter if you sacrifice some of your monsters. Also, gift of the martyr help getting rid of cyberstein after using his effect, while abyssal designator is wayyyy to useful than destructotron (even if I use both of them).
Man this deck has an immense power, don't understimate it.
I noticed that most times, your life points are above 1100 and below 1800.So, I use that seal trap card (forgot the name) that reduces your lp by 500 on your standby phase and lets you cancel one card effect on the field.Its useful so that you can: cancel Umi, Harpies Hunting Ground, Wonder ballons (the counter lowers to zero ), masks, or any continuous trap card.And since it lowers your lp by 500 on your standby phase, you get your opponent by surprise and use stein shortly after.You can also use it as a countdown and to prevent him from lowering your lp.
I also use vampire dragon to get Stein.Its good in that it gives you stein no matter what (unless he uses hane-hane or lizard to put it back in your hand.But then you just soul exchange summon it again.)