1st edition blue eyes white dragon booster box Yu-Gi-Oh! Legend of Opening! but also for introducing famous cards like Exodia the Forbidden One Yu-Gi-oh! TCG: Legend of Blue

Booster Pack (Pokemon 2000 Topps Movie | Pokemon Cards) prices are based on the historic sales

This page shows current market prices, recent eBay sales, PSA graded values, and price history for this Rare Rainbow card from Team Up

Un-Honorable Mention: Lila, Hospitality Hostess Quick shoutout to an Un-set card that fits my description but doesnt deserve a spot on the actual ranking for obvious reasons

Level 4 and lower monsters also have effects that can be activated by banishing themselves from the GY, specifically to recover cards for better consistency -- pretty much acting like Spell Cards that summon from the Deck with GY Effects

The back side [[Aang, Master of Elements]] has already caused several older cards to spike in price, especially buyback spells like [[Searing Touch]], which you can repeatedly cast to close out the game