Being an Amber card, you have a lot of strong characters to choose from to fill this role: Mufasa, Betrayed Leader (how fitting), Hades, King Of Olympus, or Simba, Protective Cub (again, how fitting)
As such it is far more effective and far less risky than Show and Tell assuming you have accumulated several substantial things you should be able to dodge any answers they might have and significantly overpower whatever they might have in play after it all
If Jenova isn't on the battlefield at the time its first ability resolves, use Jenova's power as it last existed on the battlefield to determine how many counters to put on the target creature
Notably, to turn on the Shadow lands, it is important to use the Battle land Cinder Glade, since it is a Mountain that satisfies both types, but we also simultaneously want a high number of basics to let our Glades enter the battlefield untapped
The event had a trading board set up, where players could swap cards of the same rarity level to complete their quest