This was a control type of deck played by Sander Wojcik from the Netherlands
Nissa comes with the flexibility of a variable mana cost, but what makes her truly fearsome is her +1 ability
Adding this to an Atraxa, Praetors' VoiceAtraxa, Praetors' Voice deck could give another counter to your board, as well as some additional interaction to slow down your opponents
(May 24th, 2017) Grey Stamp Theory (June 28th, 2017) Thick Vs Thin Stamp (August 16th, 2017) acebrens Collection (search term: thin) If you happen to know or have any 1st edition stamp variations not covered, please let me know (with pictures if possible)
The effect is not bad either, and it allowed N to be played on many decks for years
Admittedly, it's unlikely that many decks will have access to enchantment removal, but enchantment removal is fairly commonplace in sideboards