Source: Pokemon Trading Card Game Japan (via Polygon)
Online I see: Perhaps the most obvious way to tell is if your card is shadowless is if the bottom of the card says "1995, 96, 98, 99 Nintendo Creatures...." If the card has the year "99" at the bottom, then it is shadowless
Iconic Cards Urzas Saga : Back to Basics Show and Tell Time Spiral Yawgmoth's Will Sneak Attack Serra's Sanctum Gaea's Cradle Tolarian Academy Urzas Legacy : Tinker Grim Monolith Memory Jar, which was emergency-banned Urzas Destiny : Positives: Very iconic cards
This card can not only play Holly for free, but you can also search for a Holly card from the top cards of your deck
In case you didnt know, theres a lot of serious Final Fantasy collectors out there, and these folks have really come out in support of the cards/art that depict their favorite characters or scenes
Creator of the Sacred Beasts Level 8 LIGHT You can only use each of the [1] [2] [3] effects of this card once per turn