This makes it as hard to build with as it is to review as you always have it as a viable option and have to work out if it is something your deck will make good use of as well as factoring in what you are playing against

Madison Li Guide of Souls Hydroelectric Specimen Liberty Prime, Recharged Lightning Runner Overclocked Electromancer Pinnacle Monk Razorfield Ripper Rex, Cyber-Hound Riddle Gate Gargoyle Robobrain War Mind Roil Cartographer Salvation Colossus Sentry Bot Sphinx of the Revelation Synth Eradicator Tempest Harvester The Motherlode, Excavator Volatile Stormdrake Whirler Virtuoso Witch Enchanter Instants (8) Aether Spike Electrosiphon Galvanic Discharge Glimmer of Genius Harnessed Lightning Rush of Inspiration Sink Into Stupor Tune the Narrative Sorceries (5) Jolted Awake Localized Destruction Reiterating Bolt Suppression Ray Wrath of the Skies Enchantments (4) Aether Revolt Era of Innovation Mechanized Production Scurry of Gremlins Artifacts (19) Aether Refinery Aetherworks Marvel Animation Module Arcane Signet Automated Assembly Line Bespoke Battlewagon Conversion Apparatus Decoction Module Fabrication Module Filigree Racer Gonti's Aether Heart Izzet Generatorium Panharmonicon Plasma Caster Phyrexian Ironworks Sol Ring Solar Transformer Stone Idol Generator Unstable Amulet Lands (33) Adarkar Wastes Aether Hub Arid Mesa Axgard Armory Azorius Chancery Battlefield Forge Cascade Bluffs Command Tower Elegant Parlor Ferrous Lake Flooded Strand Hallowed Fountain HELIOS One Inventors' Fair Island x2 Meticulous Archive Mountain Mystic Gate Mystic Monastery Perilous Landscape Plains Port Town Prairie Stream Raugrin Triome Rugged Prairie Sacred Foundry Scalding Tarn Shivan Reef Skycloud Expanse Spire of Industry Steam Vents Thundering Falls This is my Satya, Aetherflux Genius deck of choice right now

Id like to see a ladder or any sort of competitive play prior to a tournament mode and set on an incentive to see MTG: Arena as its own thing
It is the most appropriate answer to the more extreme decks you might face that will have very serious things down potentially very fast
Ditto for Phyrexian Vindicator, though it sends damage to any target
If youd rather buy a ready-made deck, Lathril and Wilhelt are precon face cards you can grab complete for ~$2530