base set pokemon card set 1999 Pack Triangle Pack Error Blastoise Art Stage 1 Pikachu - Base Set -

A new card type, especially with a rules-bearing subtype, is an exceptionally high amount of work, but this is a pretty great example of how additional tasks fall out beyond the obvious work necessary to implement new mechanics

I like the idea of triggering the first couple ticks of a Saga, then returning them to my hand before they die, only to cast them again

You can get a Wonder Hourglass and a Shop Ticket from pulling an Arcanine EX during the event, but thats more of a nice perk than a reason to chase the card specifically

Other known examples include GP Promo Grizzlebrand and various Japanese M15 green foils

The reverse is not true

Cards like Chromatic Lantern are good for sunburst, as are dual lands that don't have basic land types