Because Pokemon Tool cards are based on held items in the mainline video game series, the Pokemon TCG has had many examples of Tool cards since the Gold and Silver era
While Sarevok, Ferocious Usurper offers a unique ability with the potential for a significant power boost, there are other cards like Death's Shadow or Gurmag Angler that may be more efficient choices for a similar strategy
one opponent character with 3,000 power or less
THE EXTRAS Flametongue Kavu, Goblin Cadets, Gomazoa, Plumeveil, Rapacious One, Spurnmage Advocate, Vedalken Plotter, Brainstorm, Breath of Darigaaz, Journey to Nowhere, Lash Out, Murmurs from Beyond, Perilous Research, Pollen Lullaby, Prison Term, Prophetic Prism, Punishing Fire, Repulse, Scattering Stroke, Skyscribing, Vision Skeins, Whirlpool Whelm, Evolving Wilds, Terramorphic Expanse I was originally going to call this the chaff as in whats left behind once you harvest the usuables from the deck but honestly, in Commander, just about any card can make the cut in the right circumstances
To bypass Kadabra, Abra featured an attack that allowed it to evolve straight into Alakazam