At the time of Antiquities , the rules of protection were still up in the air (Revised was the set that really established the basic fundamentals of modern day protection), so the Antiquities design team (Skaff Elias, Jim Lin, Joel Mick, Chris Page and Dave Pettey) decided to make cards that had an ability like protection from artifacts
In the case of John Silver, Greedy Treasure Seeker - it really depends on how many locations you can play alongside the character
In the image above, we have placed two real cards among the decidedly-fake Teferi cards, and shuffled them up for about two minutes, and picked out what we thought were the fakes in three repeated tests of this
Tifa Lockhart 7 Printings and their Prices Track Tifa Lockhart Prices Free collection tools for Magic: the Gathering
See Mini Games rules above
When looking at Pip-Boy 3000, its entirely unsurprising this is happening thanks to the cards fantastic utility