C Common Backlinker X DARK Level 3 [ CyberseEffect ] ATK 1600 DEF 0 If only your opponent controls a monster in the Extra Monster Zone, you can Special Summon this card (from your hand)
You can discard 1 card, then target 1 face-down monster your opponent controls
In terms of tech pieces, Puzzlomino, the Drop-N-Deleter is a hilarious way to boost up our Silent Zero monsters, and Angelicas Angelic Ring is another Spell negate, along the same lines as Silent Magician Zero
The Extra Deck "Mathmech" monsters are the combined forms of the "Mathmech" monsters
I always use the Dueling Nexus deck builder to build my decks I always use the shuffle button to test my opening hands before I test the deck in a duel.
However, the summoning conditions are strict