Your best cards tend to be commons, which are Spellgorger Weird, Goblin Wizardry (which creates two Prowess creatures and happens to trigger Prowess as well), Opt and Crash Through
Virtual World Deck Guide Still the defining Deck of the current meta for Ranked Duels, Drytron Fairy Decks are unmatched in their consistency in getting key monsters out on the field, which can be hard to use Extra Deck counters against as the boss monsters are Ritual Monsters
Dialga EX, Solgaleo EX, and the Skarmory duo have all added to the cause, and now, the Steel Apron joins the bandwagon
More importantly, this is a great introduction to Ruby/Sapphire's focus on Item cards, which set 7 Legendary cards in Lorcana emphasize through the new Tamatoa and Scrooge McDuck
negate its effects, then if it battled this turn, you can take control of it until the End Phase
Kristen breaks down ten great variations on Counterspell that you should be trying out in Commander