Intruder's Inquisition is easy to play and can come up late-game to get rid of one of your opponent's win conditions if they're playing a more midrange deck to get rid of their top-end
It makes almost any creature into a win condition
Rhystic Study Introduced in Prophecy , rhystic spells weren't received too well but one of them bloomed into one of the strongest Commander staples: Rhystic Study

Peer Through Time Teferi, Temporal Archmage | Illustration by Tyler Jacobson Commander (1) Creature (25) Azure Mage Fathom Seer Fog Bank Willbender Dulcet Sirens Riptide Survivor Sea Gate Oracle Shaper Parasite Reef Worm Mulldrifter Ixidron Stitcher Geralf Stormsurge Kraken Steel Hellkite Brine Elemental Frost Titan Sphinx of Jwar Isle Sphinx of Magosi Phyrexian Ingester Sphinx of Uthuun Hoverguard Sweepers Lorthos, the Tidemaker Artisan of Kozilek Breaching Leviathan Deep-Sea Kraken Instant (10) Pongify Cyclonic Rift Into the Roil Turn to Frog Exclude Cackling Counterpart Domineering Will Dismiss Intellectual Offering Stroke of Genius Sorcery (7) Call to Mind Compulsive Research Concentrate Rite of Replication Rush of Knowledge Aether Gale Distorting Wake Enchantment (3) Fool's Demise Infinite Reflection Well of Ideas Artifact (16) Assault Suit Commander's Sphere Crown of Doom Dreamstone Hedron Everflowing Chalice Mind Stone Nevinyrral's Disk Sapphire Medallion Sky Diamond Sol Ring Swiftfoot Boots Thran Dynamo Tormod's Crypt Unstable Obelisk Ur-Golem's Eye Worn Powerstone Land (38) Coral Atoll Ghost Quarter Lonely Sandbar Myriad Landscape Remote Isle Tectonic Edge Zoetic Cavern Island x31 Commander, Themes, and Strategy Peer Through Time is the 2014 mono-blue deck featuring Teferi, Temporal Archmage as its face commander with Stitcher Geralf and Lorthos, the Tidemaker as the alternate commanders

Giving all of your zombies Afflict 3 means that you have guaranteed damage for just swinging out
, Tap an untapped Rebel you control: Return this card from your graveyard to the battlefield tapped