Struggling to get rid of your opponents stronger monster, during your battle phase

4.35 - Damage Step Something to note is that the Damage Step has very specific restrictions on which cards you can use: Flip effects and other card effects that specifically state Damage Step or any of the sub-steps like Damage Calculation Quick effects that negate the activation of a card or effect (Note that there are ruling discrepancies and outside of Asia, the quick effect not only has to negate the activation of a card or effect, but must also specifically state that it is activated in response to the card or effect it will negate, so Horus Lv8 will always activate regardless of the ruling however, Abyss Dweller , will not activate if you're playing outside of Asia) Cards with effects that activate when their battle position is changed or when they are moved from one zone to another zone (for example Monster Zone to Graveyard) mandatory effects that have to activate when triggered, even if they don't mention the damage step Counter Trap Cards (Any trap card with this symbol ) Cards that modify the ATK/DEF of a specific target Now that we have a good understanding of what we can and can't do, let's proceed into the Damage Step

Gonti, Night Minister Theft decks want you to think they always have opponent's cards to play, and while that might not always be true, Gonti, Night Minister is there to reward you with treasure
you can Tribute Summon 1 monster during your Main Phase this turn, in addition to your Normal Summon/Set this turn
You can't accidentally scratch a set symbol off a card cleanly