Taking down some of the structure around which he builds his strategy could give Kaiba a bit more flexibility and maybe help him to see those other avenues for winning
The best staple trap cards in the current Yu-Gi-Oh Master Duel meta are trap cards that negate your opponents cards and effects in order to slow down their deck
At the end of the Damage Step, when the equipped monster attacks an opponent's monster, but the opponent's monster was not destroyed by the battle: You can make the opponent's monster's ATK 0 (even after this card leaves the field or the monster becomes unaffected by card effects), and if you do, the equipped monster can make a second attack on the same monster in a row
As it went, he ended up with a pretty horrible Pack 2 that I dont think he really could have anticipated, but a very good Pack 3 due to correctly identifying that green was the most open color for his seat.
C Common Hanewata X LIGHT Level 1 [ FairyTunerEffect ] ATK 200 DEF 300 (Quick Effect): You can discard this card
You can only activate 1 "Old Mind" per turn