The very first Charms appeared in Mirage
Thunder Dragon Colossus X DARK Level 8 [ ThunderFusionEffect ] ATK 2600 DEF 2400 "Thunder Dragon" + 1 Thunder monster Must be either Fusion Summoned, or Special Summoned during the turn a Thunder monster's effect was activated in the hand, by Tributing 1 Thunder Effect non-Fusion Monster (in which case you do not use "Polymerization")
Crystal Wing Synchro Dragon allows players to negate a monster effect once per turn and gain the ATK of the destroyed monster until the end of the turn, which can make it frustrating for the opponent to destroy in battle
$0.49 Ice Magic Final Fantasy $0.49 Laughing Mad Final Fantasy $0.49 Barret Wallace Final Fantasy $0.49 Triple Triad Final Fantasy $0.49 Suplex Final Fantasy $2.99 Tablet of Discovery Secrets of Strixhaven $0.49 Summon: Esper Ramuh Final Fantasy $0.49 Swallowed by Leviathan Final Fantasy $0.49 Prompto Argentum (0387 - Borderless) Final Fantasy Variants $0.49 Sorceress's Schemes Final Fantasy $2.49 Fire Magic Final Fantasy $0.49 Prompto Argentum Final Fantasy
Its a great source of card draw, and it incentivizes people to attack specific players
Which are the best, and where will they fit into your strategies