Vapor Snag, Pongify, and Rapid Hybridization are catchall "removal" spells that screw with basically every creature-combo in the format, not to mention aggressive decks like Affinity and Infect
Moltres ex (Fire / Genetic Apex) Moltres has a 70 damage attack, but its main strength is an attack that fuels up to three energy on your benched Pokemon - a great way to power up Charizard and others
I love the idea of using Knight of the Reliquary with Brought Back, as it does some of the least degenerate stuff imaginable while still feeling like its a pretty good effect
Your opponent can choose to block with their creatures as normal if they choose to, but the attacking creatures that it's blocking is only revealed after blockers are fully accounted for
Of course, along the way I picked up a few gems here and there, which I put in protective sleeves and a three-ring binder