Letting players build a deck without limitations is like letting them choose what pieces to use in a chess game, incentivizing building an army of queens as weaker pieces become redundant
Though these aren't just Spells, the ones relevant to this article are Raigeki, Dark Hole, Interrupted Kaiju Slumber for monsters, and Harpie's Feather Duster for Spells and Traps
C Common C Common R Rare Related Cards View as Gallery View as List Elemental HERO Shadow Mist X DARK Level 4 [ WarriorEffect ] ATK 1000 DEF 1500 If this card is Special Summoned: You can add 1 "Change" Quick-Play Spell Card from your Deck to your hand
During your opponent's turn, if this card is sent from its owner's hand or field to the GY: You can send 1 card from your hand or field to the GY, and if you do, Special Summon this card
All monsters on the field lose 500 ATK and DEF
The options are there, but its difficult to know exactly what ACE SPEC to run that is, of course, unless youre running White Kyurem EX