Yu-Gi-Oh! Duel Links is planning on having it's first Tag Duel event coming this late January! Not much detail is shared about it, but it's possibly only a limited time event, similar to the previous "special duels event 1 & 2." This page will be updated as soon as more details are revealed from the game.
How it works
Tag-Team Duel is a 2v2 Duel using either the same LP as usual duels, or a combined of 2 players. In Duel Links' case, it's either 4000 LP, or going to be 8000 LP. Each team shares the same field but uses their own cards from their decks.
Cards in the deck
Certain rules can vary during this event, but standard dueling rules will still apply. This will mean that both players cannot bring more copies of cards that are limited than allowed, but you can bring 3 of the same card in each player's deck that are not limited for a total of 6.
In Tag Duels, you can work together with your teammate through each other's cards, but you are not able to activate their set spell/trap card, as well as their monster's effect during your turn.
A person from a team will be chosen to go first. Afterwards, it will alternate to your opponent, then back to the teammate of the first team. An official rule of the tag duel tcg states that the first duelist who can make an attack is the duelist who goes fourth.
Tag duel is really fun!! (Tag force as base)
1) you don't known your opponents deck x2
2) you don't known your team deck unless you are playing with a friend
3) you can use/activate partner's cards on the field, or use it as fusion summon.... but one wrong move can make your partner deck failed.
So if both players used field spell skills, which will activate, or will the field spell take turns, bec that would be stupid!?
I think there will be a sole different skill system cause imagine Guardians Unite!