The only downside for Zareth is if you want to use its second ability, you have to somehow get it into your hand, which can be done with ninjutsu cards like Prosperous Thief, trading them back and forth from your hand
Control is almost always the minority when breakdowns of formats are created
Agonizing Demise Blast from the Past Blink of an Eye Bold Defense Burst Lightning Cinderclasm Colossal Growth Consult the Star Charts Dauntless Unity Dismantling Blow Divine Resilience Ertai's Trickery Explosive Growth Falling Timber Final Flourish Firebending Lesson Fires of Victory Galadriel's Dismissal Gift of Growth Heroic Charge Hurloon Battle Hymn Inscription of Abundance Into the Roil Jilt Joint Exploration Magma Burst Might of Murasa Orim's Chant Orim's Thunder Orim's Touch Overload Pollen Remedy Prohibit Protect the Negotiators Rona's Vortex Rushing River Scorching Lava Shell Shield Shivan Fire Snatch Back Stall for Time Stomped by the Foot Strength of Night Strength of the Coalition Tear Asunder Timely Interference Tribute to Urborg Unstable Footing Urza's Rage Vampire's Bite Vayne's Treachery Vicious Offering Vigorous Charge Vines of Vastwood Warhost's Frenzy Waste Management Whoosh

To do this, players can put as many cards as they want from their hand to the bottom of their deck and draw new cards to replace them before reshuffling the deck
It is a nostalgia fest with retro frames, unique art, shock lands, and loaded with cards your recipient is likely to recognize and appreciate
Additionally Dungeon Decks are designed to be played against basic starter decks with players unlocking the ability to add new cards by gaining experience from defeating dungeons and leveling up