It seems like multiple Lord of the Rings cards with art by the Hildebrandts, including River Keplie, Abyssal Persecutor, and Seasons Past, have all become much more costly in the last month or so
Null Elemental Blast Terrific against Omnath, Locus of Creation decks, Null Elemental Blast is awesome in Commander

Scientists Aang's Journey Absorb Vis Abzan Monument Academy Rector Aerial Surveyor Agency Outfitter Ainok Guide Ajani's Aid Alabaster Host Intercessor Alpine Guide Alpine Houndmaster Altar of Bone Ambitious Farmhand Amrou Scout Analyze the Pollen Anchor to Reality Ancient Excavation Angel of the Ruins Angel's Herald Angrath's Fury Arachnus Spinner Archaeomancer's Map Archdruid's Charm Archmage Ascension Arena Rector Arid Mesa Armillary Sphere Artificer's Intuition Ash Barrens Ashiok's Forerunner Asmoranomardicadaistinaculdacar Assembly Hall Atalan Jackal Attune with Aether Auratouched Mage Aurochs Herd Avarax Axgard Armory Ayara's Oathsworn Bad River Balamb T-Rexaur Bant Panorama Basri's Aegis Battalion Foot Soldier Battle Plan Beamsaw Prospector Beanstalk Giant Beanstalk Giant Bebop, Warthog Warrior Bedhead Beastie Begin the Invasion Behemoth's Herald Behold My Grandeur Behold the Beyond Beneath the Sands Beseech the Mirror Beseech the Queen Bifurcate Bilbo, Birthday Celebrant Binding the Old Gods Bioengineered Future Biomechan Engineer Biotech Specialist Birthing Pod Bitterheart Witch Bitterthorn, Nissa's Animus Black Chocobo Blighted Woodland Blightspeaker Blood Speaker

While white doesn't have the easiest time getting to threshold, I've heard that playing Armageddon plus good weenie creatures can be a viable strategy
Using a caliper to measure the card's dimensions is a great idea