If the ability copied by Vantress Visions is modal (that is, if it says, "Choose one " or similar), the mode is copied and can't be changed
It used an alternate format that took heavy inspiration from the board game Clue (also called Cluedo)
both creatures die, but your guy goes to the command zone where you can cast him again for two more mana, adding eight more Kobolds to the field and giving Prossh the potential to hit for nineteen keep in mind you kill opponents when they take twenty-one total combat damage from a single Commander, and Prossh can easily make that happen all on his own
Probably the best affinity commander in the game, Urza is also hard to deal with thanks to affinity for artifact creatures
I was originally using a deck I didnt really like and this was my safe, familiar choice. Gabriel Fernandez Senior Division World Championship Lugia VMax Deck 3x Lugia VMax 4x Lugia V 4x Archeops 1x Lumineon V 1x Snorlax 1x Drapion V 1x Pumpkaboo 1x Wyrdeer V 1x Slaking V 1x Radiant Tsareena 3x Professors Research (Professor Albora) 3x Iono 3x Boss Orders 1x Professor Burnet 4x Ultra Ball 2x Nest Ball 4x Capturing Aroma 2x Choice Belt 2x Path to the Peak 2x Collapsed Stadium 4x Double Energy Turbo 4x Jet Energy 2x Gift Energy 2x Theraputic Energy 2x V Guard Energy While the card never came into contention in the final match, Fernandez admitted that he may not have even reached that stage had it not been for his Slaking