Rather than an expensive ultimate you'll never get to use, Elspeth has three cheap and useful abilities

Sort Card Type Shroomish #69Common $0.55 Shroomish #78Common $1.36 Shroomish #72Common $1.70 Shroomish #63Common $0.90 Shroomish #108Common $0.35 Shroomish #127Common $5.74 Shroomish #6Common $0.23 Shroomish #15Common $0.27 Shroomish #RC2Common $4.40 Shroomish #4Common $0.20 Shroomish #5Common $0.18 Shroomish #4Common $0.05 Shroomish #3Common $0.15 Shroomish #3Common $0.13 Shroomish #6Common $0.07 Shroomish #5Common $0.12 Shroomish #2Common $0.08 Shroomish #6Common $0.07 Shroomish #3Common $0.27 Shroomish #4Common $0.21 Shroomish #4Common $0.31 Shroomish #5Common $1.00 Shroomish #2Common $14.69 Shroomish #7Common Shroomish #6Common $0.49 Shroomish #2Common $14.69 Shroomish #127Common $5.74 Shroomish #RC2Common $4.40 Shroomish #72Common $1.70 Shroomish #78Common $1.36 Shroomish #5Common $1.00 Shroomish #63Common $0.90 Shroomish #69Common $0.55 Shroomish #6Common $0.49 Shroomish #108Common $0.35
39 x 1 Slowpoke Lvl
Keep him on the board long enough, and Vivi becomes a powerful attacker in his own right, but his real value lies in the win conditions you can create with the killer combination of free mana and pinging
I collect them because they remember me. That sentence hits differently than it should
The Celebrations set features reprints of classic cards - so for me, the holy grails are the reprints of Charizard, Blastoise, and Venusaur, looking exactly as they did back in their nineties Base Set configuration, just with an extra 25th anniversary slapped on top