With just one attack, Fighting Tackle, you can deal a significant amount of damage in a single attack
Flashback is one of the games most powerful mechanics, and it doesnt get much simpler than Ray of Revelation
(They can't be blocked as long as defending player controls an Island.) Creature - Horror Squid Color tag templates(None) Detective of the Month Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) As long as you have the city's blessing, Detectives you control can't be blocked
UR Ultra Rare UL Ultimate Rare Raidraptor - Rise Falcon X DARK Rank 4 [ Winged BeastXyzEffect ] ATK 100 DEF 2000 3 Level 4 Winged Beast-Type monsters This card can attack all Special Summoned monsters your opponent controls, once each
You can use renting as an on-ramp of sorts, renting the majority of cards in a deck you play at first, and then gradually renting less and less over time as you build your collection
So the game is generally not paid to win, but its more pay to have a variety of different powerful decks