The two most played removal spells by a large margin were Lightning Bolt and Path to Exile the former of which could be played early but could only kill small creatures, while the latter could deal with any creature but was punishing to play in the early turns of the game
Cascade is a wild ability, but when you can reliably make it happen it gets even wilder

Labs Aang's Journey Aang, Master of Elements Aardvark Sloth Abattoir Ghoul Abiding Grace Absolving Lammasu Absorb Absorb Vis Abuna's Chant Abundant Maw Abzan Guide Acolyte of Aclazotz Act of Aggression Adorable Kitten Adventurer's Inn Adventurous Eater Aerial Assault Aerial Predation Aerial Responder Aerith Gainsborough Aetherflux Reservoir Agate-Blade Assassin Ageless Entity Agent of Masks Agonizing Syphon Airdrop Aeronauts Ajani Goldmane Ajani Vengeant Ajani's Mantra Ajani's Pridemate Ajani's Sunstriker Ajani's Welcome Ajani, Inspiring Leader Ajani, Mentor of Heroes Ajani, Sleeper Agent Ajani, Strength of the Pride Ajani, Wise Counselor Ajani, the Greathearted Akoum Refuge Al Bhed Salvagers Alabaster Mage Alchemist's Gift Alert Heedbonder Alhammarret's Archive Alive // Well Alive // Well Alley Assailant Alms of the Vein Alquist Proft, Master Sleuth Altar of the Pantheon Amalia Benavides Aguirre Amateur Hero Amazing Alliance An Incident Has Occurred An-Havva Inn Ancestor Dragon Ancestor's Chosen Ancestor's Prophet Ancestral Tribute Anchovy & Banana Pizza Ancient Cornucopia Angel of Destiny Angel of Mercy Angel of Renewal Angel of Vitality Angel's Feather Angel's Mercy Angelheart Vial Angelic Chorus Angrath, the Flame-Chained Animal Boneyard

When you play this at a multiplayer table, you can skip ahead three or four turns very quickly
You get an emblem every time Sephiroth transforms into One-Winged Angel
As warping counts as casting from outside your hand, it triggers both Doctor Who's paradox keyword , and commanders like Prosper, Tomb-Bound