This is all my opinion, but hopefully you'll agree
Whenever a creature enters, untap all creatures
Furthermore, if the battle is running long and the opponent is low on cards, this can force them to run out and cause them to lose on a technicality
Finally, the fact that Charizard ex has Terastallized into a Fire-type Pokmon and its attacks name of Burning Darkness implies that it is the sets titular Ruler of the Black Flame
Assaultron Dominator Big Mother Mouser Celebr-8000 Chrome Dome Codsworth, Handy Helper Curie, Emergent Intelligence Depthshaker Titan Dragon Man, Reformed Robot ED-E, Lonesome Eyebot Emissary Escort H.E.R.B.I.E., Lovable Robot Jocasta, Automaton Avenger K-9, Mark I Krang, the All-Powerful Mendicant Core, Guidelight Mister Gutsy Omniclown Colossus Panther Robot Patrolling Peacemaker Pinnacle Emissary Ravenous Robots Repulsor Bots Rex, Cyber-Hound Roadkill Rodney Rose, Cutthroat Raider Rust Harvester Securitron Squadron Sentry Bot Super-Adaptoid Surge Conductor The Motherlode, Excavator The Vision Tri-Sentinel, Act of Vengeance Ultron, Machine Overlord Ultron, Unlimited Vision, Spectral Synthezoid Vision, Synthezoid Avenger Yes Man, Personal Securitron
All prices are in Canadian Dollars