You can see the artwork for every card here
Merfolk Trickster- Can do a lot of different impactful small things (tap an attacker, tap an elf in upkeep to slow them down, tap Parhelion, etc)
The most expensive Pikachu card, and the most expensive trading card of any kind, is the 1998 Pikachu Illustrator
Last Voyage is fittingly last in a line of viable cards that can achieve this combo, coming fourth behind Dance of the Dead, Necromancy, and Animate Dead
Each one provides a different, essential perspective on a card's value
A generic blister pack that contains a promo card, wont be worth as much because it is cheap to begin with, readily available almost anywhere, and the cards themselves usually arent that sought after