Once on the field, if it can simply declare an attack it can target a face-up Spell and destroy it, clearing the field of pesky field spells
All things considered, this variant places a ton of pressure on the opponent to constantly handle any threats you throw their way, otherwise the advantage begins to compound upon itself, giving you the duel on a silver platter
Surfacing Big Jaws Level 4 WATER Fish Effect Monster ATK/ 1800 DEF/ 300 If this card is used for the Xyz Summon of a WATER monster, it can be treated as a Level 3 or 5 monster
And now we have ABCDE
Once per turn, if a Pendulum Monster Card(s) in your Monster Zone or Pendulum Zone would be destroyed by battle or card effect, you can send 1 Spellcaster-Type monster from your Deck to the Graveyard instead
One example is a deck using the Paradox Brothers and the Guardian trio to stall out Leo until you have enough monsters to use Union Attack on Gravekeepers Vassal for the win