Overall) - Freya Crescent This one-mana on-curve uncommon has flying on your turn and then is a mana tapper for red that can only be used for casting or equipping that spell, so she's brilliant in that brew, ideally in the 99 or support outside of Commander, not leading it
I do not think anything dictates how a random selection needs to be made, so I'd say the answer is that any mutually agreeable method is fine, and if you can't agree, call a judge
A 5-cost 6/5 with haste and trample is already a solid body, being able to get onto the field, ignore chump blockers, and do damage immediately
Abaddon the Despoiler, Zethi, Arcane Blademaster and Lilah, Undefeated Slickshot can each add a significant number of free spells to your storm turn
Join me again tomorrow for a new guild and a new Standard deck.