Arcane Laboratory slows down our opponents (Zur's ability doesn't count as casting)
If you want consistent tutoring, this is your hero
The three toughness makes it immune to Stomp, which is a defining trait of playable aggressive cards in this format

Aang, Master of Elements Aang, Swift Savior Aang, at the Crossroads Aberrant Researcher Aetherblade Agent Afflicted Deserter Alluring Suitor Ambitious Farmhand Archangel Avacyn Arguel's Blood Fast Arlinn Kord Arlinn, Embraced by the Moon Ashling, Rekindled Ashling, Rimebound Assimilate Essence Attentive Skywarden Autumnal Gloom Avacyn's Collar, the Symbol of Her Church (playtest) Avacynian Missionaries Avatar Aang Ayara, Widow of the Realm Azor's Gateway Balamb Garden, SeeD Academy Bane of Hanweir Bereaved Survivor Blight Titan Blighted Burgeoning Blightreaper Thallid Bloated Processor Bloodline Keeper Bloodsworn Squire Bonded Herdbeast Bound by Moonsilver Branded Howler Brass's Tunnel-Grinder Breakneck Rider Brigid, Clachan's Heart Brigid, Doun's Mind Brimaz, Blight of Oreskos Bruce Banner Captive Weird Catapult Fodder Cecil, Dark Knight Chalice of Life Chilling Chronicle Chosen of Markov Chrome Host Seedshark Civilized Scholar Cloistered Youth Compleated Huntmaster Concealing Curtains Conduit of Storms Converter Beast Convicted Killer Corruption of Towashi Cren, Undercity Dreamer Cryptolith Fragment Curious Homunculus Daring Sleuth Daybreak Ranger Deathbonnet Sprout Delver of Secrets Desperate Farmer Docent of Perfection Dormant Grove Dowsing Dagger Dowsing Device Duskwatch Recruiter Ecstatic Awakener Eddie Brock Edgar Markov's Coffin Eirdu, Carrier of Dawn

Kindred Discovery is bonkers
Part of Magic's ongoing Universes Beyond umbrella brand, it is a collection of four Commander decks and three Secret Lair drops