Investigate may look simple at first, but as you've seen today, it has a lot more depth to it once you start digging into the rules, the synergies, and all the different ways Magic has used it over the years
It is a bit too expensive and unreliable to play this just as a mass removal spell, despite one sided mass removal being so broken in cube

3 Braska's Final Aeon Cecil, Dark Knight Cecil, Redeemed Paladin Chaos, the Endless Choco, Seeker of Paradise Cid, Timeless Artificer Clive, Ifrit's Dominant Cloud of Darkness Cloud, Midgar Mercenary Cloud, Planet's Champion Crystallized Serah Diamond Weapon Dion, Bahamut's Dominant Edgar, King of Figaro Emet-Selch, Unsundered Esper Terra Excalibur II Exdeath, Void Warlock Fang, Fearless l'Cie Firion, Wild Rose Warrior Freya Crescent G'raha Tia Gaius van Baelsar Galian Beast Garland, Knight of Cornelia Garnet, Princess of Alexandria Gilgamesh, Master-at-Arms Giott, King of the Dwarves Gladiolus Amicitia Gogo, Master of Mimicry Golbez, Crystal Collector Hades, Sorcerer of Eld Hope Estheim Hydaelyn, the Mothercrystal Ifrit, Warden of Inferno Ignis Scientia Jecht, Reluctant Guardian Jenova, Ancient Calamity Jill, Shiva's Dominant Joshua, Phoenix's Dominant Judge Magister Gabranth Kain, Traitorous Dragoon Kefka, Court Mage Kefka, Ruler of Ruin Kuja, Genome Sorcerer Lightning, Army of One Lightning, Security Sergeant Locke Cole Lunatic Pandora Matoya, Archon Elder Minwu, White Mage Neo Exdeath, Dimension's End Noctis, Prince of Lucis Omega, Heartless Evolution Phoenix, Warden of Fire Prompto Argentum Queen Brahne Quina, Qu Gourmet

Both keywords work the same as usual because vigilance doesnt care when a creature will become untapped next
Right now, trainers opening packs have to manually select the pack they want to open each time
Peasant is all of these things as well, but you can have up to five uncommon cards in your deck too