This means Aven Courier can copy shield counters and pass them around the field, or one of the buff counters used by Denry Klin
Base Set 2 seems pretty unlikely, but Trainer Deck B was March 1999 if its the one Im thinking of with the red border backs
A Lost Origin master set includes all standard cards, reverse holo versions, and Secret Rares for a total of 396 cards 196 standard set cards , 149 reverse holos , and 51 Secret Rares
Offer to blow up that aura in exchange for destroying the player who cast it
Know your cards, know your deck, know your Field, and you will be better prepared to face-off against other players!
With Partner and Friends Forever, Your deck's colour identity is defined by both of your Commanders combined: for Chief Jim Hopper and Lucas, the Sharpshooter make the deck's colour identity Jeskai (white, blue, and red), while Ishai and Armix make it Esper (white, blue, and black)