It might not keep the top spot with other big, colorless cards around, although I never expect this to be anything close to bulk
No shadow Shadowless (still 1999, still valuable) Soft grey shadow Unlimited Step 3 (optional): Check the copyright text The copyright line at the bottom of the card varies by print run: 1st Edition / Shadowless: "1995, 96, 98, 99 Nintendo, Creatures, GAMEFREAK 1999 Wizards" (note the double 1999 ) Unlimited: Same copyright line, drop shadow added 1999-2000 (eighth print): "1999-2000" appears at the bottom right For Trainer and Energy cards (which never had drop shadows in any print run), the copyright text is the only reliable way to differentiate between print runs
It only lasts until you upkeep as mentioned, but then you get an unblockable creature
For this list, I go over all legendary snakes printed so far, with one minor exception: Orochi Eggwatcher