Esper Sentinel basically is guaranteed to be a four-of staple in artifact aggro decks like UW Blackstaff and Tempered Steel (archetypes on the rise thanks to other Jumpstart: Historic Horizons additions like Nettlecyst and Thought Monitor), but its power goes beyond being a one-mana artifact creature
In the mainline games, Politoed has carved a niche role, often utilized for its access to moves like Hypnosis and its Hidden Ability, Drizzle, which sets rain upon entry into battle
In the end, this combination of smaller Pokemon's Fusion Strike attacks being used by Mew VMAX turns out to be incredibly strong.
Remember, it was Magicas shadow that stole the Trident
Malakir Rebirth is a one mana instant that costs two life when you cast it, but then will save a targeted dork from death and recur it to the battlefield for another go around the bin