In general, you can't make an illegal or impossible choice
For Riveteers Charm's first mode, if the target opponent controls more than one creature or planeswalker with the highest mana value among creatures and planeswalkers they control, that player chooses which one to sacrifice as Riveteers Charm resolves
Gallery and List of Book Cards Arcane Encyclopedia Autograph Book Barrin's Codex Book of Rass Codie, Vociferous Codex Diary of Dreams Emmessi Tome Five Hundred Year Diary Folio of Fancies Fool's Tome Geth's Grimoire Grimoire of the Dead Heirloom Epic Illuminated Folio Investigator's Journal Jalum Tome Jayemdae Tome Jodah's Codex Kyren Archive Mangara's Tome Marina Vendrell's Grimoire Mazemind Tome Mercadian Atlas Monster Manual My First Tome Mysterious Tome / Chilling Chronicle Otherworld Atlas Phyrexian Grimoire River Song's Diary Sarevok's Tome Sarpadian Empires, Vol
Whenever I get stuck in a rut, I remove one or more options to see if something sparks that fire
And to that effect, that is where my October Pokemon rediscovery began
Negate and Disdainful Stroke are for the mirror and Ramp decks
