I was also helped by another player playing Wars Toll, effectively turning off the interaction from my opponents in the turn I wanted to try and win
All you need in order to help is either some level of familiarity with the TCG, or a willingness to learn, along with a good design sense
If you win, creatures that player controls dont untap during the players next untap step
He ended up pulling off a truly wild combo where he put down a Starmie, powered it up with Palkias Star Portal ability, used Cross Switcher to bring up my Mewtwo into the Active Position, played Tool Scrapper to remove my Tool Jammer, attached Choice Band to boost his Starmies attack by 30, and then he topped it off with Leon to raise the attack 30 more, giving him the perfect 310 damage he needed to once again OHKO my poor Mewtwo
Whenever he quests, you have the choice to add his to another chosen characters during that turn, showcasing his willingness to assist his comrades