It will let all of your sources deal double damage until your next turn, so that's now on your turn, you attack, your damage-based sorceries and loads more
Store your valuable cards in protective sleeves and toploaders immediately after opening or purchasing them to maintain their mint condition
(You can only gain this effect once per turn.) You can target 2 "Goblin" monsters you control that have a Level, then activate 1 of these effects
Bravo, Fighter Fur Hire X FIRE Level 4 [ ReptileEffect ] ATK 1900 DEF 200 During your Main Phase: You can Special Summon 1 monster "Fur Hire" from your hand, except "Bravo, Fighter Fur Hire"
I havent had much of a chance to play with these counters yet, though cards like the Filigree Sylex have me pretty excited to try it out
However, the best era for this archetype was shortly after its release, as it was one of the top 5 decks of the 2018 meta