220 HP, no weaknesses and only a single-energy retreat cost are certainly attractive, but its not a format-warping card by any means

Stage 1 Win 6 Duel World Duels Use Skills 3 times in Duel World Duels Stage 2 Inflict 2600 or more points of battle damage in duels Use spell/trap cards five times in duels Perform 3 Xyz Summons in duels Stage 3 Win 8 Duels Inflict 5000 or more points of battle damage in one duel Destroy 3 monsters in one duel Achieve 3 No Damage wins in Duels Stage 4 Win 8 Duels Reduce your opponent's LP to 0 by inflicting battle damage with Utopia Perform 5 Xyz Summons in duels Stage 5 Win 1 Duel against Bronk Stone while playing as Yuma and Astral Inflict 25000 or more points of battle damage in duels Inflict 5000 or more points of effect damage in duels Summon 20 monster in duel world Stage 6 Win 9 duels Win a duel world duels with a duel assessment of at least 4000 Achieve 2 No Damage wins in duel world Use Rank 4 or higher Monster cards two times in one Duel World duel Stage 7 Win 9 Duel World duels Achieve 1 Comeback Victory in duels against Yuma and Astral Achieve 2 wins without using any spell/trap cards in duel world Win 3 duels within 5 turns in duel world Stage 8 Win 5 Duels using Bronk Stone Inflict 38000 or more points of battle damage in duels Summon "Tin Archduke" two times while playing as Bronk Stone Perform 4 special summons in one duel Stage 9 Win 10 duels Achieve 4 Comeback Victories Achieve 1 win using only Machine-type monster cards using Bronk Stone Summon Spellcaster-type monsters 4 times using Yuma and Astral What do you think of Zexal World in Duel Links so far

This deck has been a mainstay of my personal Commander collection for years now as part of my Modular Kicker list
Some creatures in this set also utilize finality counters
In order to stop them, then, different kinds of strategies will be necessary than what it usually takes to beat most other deck builds
Those Clans are Abzan, Jeskai, Sultai, Mardu, and Temur which players will recognize as shorthand for some of MTGs three-color combos