4 Curse Of Clinging Webs Curse of Clinging Webs pulls double duty for a Spider-themed deck
While being able to nuke the opponents' spell/traps is useful and a powerful move, there are much better cards that do this than Twin Twisters
C Common Red Mirror X FIRE Level 1 [ FiendEffect ] ATK 0 DEF 0 When an opponent's monster declares an attack: You can send this card from your hand to the Graveyard, then target 1 FIRE Fiend-Type monster in your Graveyard, except "Red Mirror"
In fact, if it is an Umbral deck, the conditions for activating effect of this card can be satisfied with just 3 new Xyz cards from Beyond the Brave
Do You Need To Sleeve Lorcana Cards
Since almost all of our creatures should have +1/+1 counters on them, when we attack with Oran-Rief Ooze, we will usually get to add a +1/+1 counter to all of our attacking creatures (or two with a Conclave Mentor on the battlefield), making our creatures even bigger, which, in turn, will gives us even more damage to smash our opponent with