This one, unlike some interactions recently, also gives you that extra main phase as well as the extra combat phase
Tergrid attacks your opponents in the untraditional sense, focusing on cutting off their resources before they can use any of them
Parallel World Fusion X SPELL Fusion Summon 1 "Elemental HERO" Fusion Monster from your Extra Deck, by shuffling your banished Fusion Materials listed on it into your Deck
This may feel intuitive for triggers that happen when you cast a spell, as those go on the stack in response to a successful cast, but this analogy provides a useful framework to explain how abilities resolve when triggered in the middle of casting a spell
Finale of Eternity and Gaze of Granite can be good options if you find your table gets too unruly.
It's a classic 'Baneslayer' before Baneslayer Angel even existed