Spend this mana only to cast noncreature spells
Mara cant stick around super long and she is quite fragile on her own, but when you go to pay her upkeep cost, you will have the best chance to protect her
That also gives you something to do with the second ability, because flickering this over and over with 4 or more power makes it a removal powerhouse
Disclaimer: We don't have any rules entries or the like for Battles yet, so I'm only going to be covering what I'm sure about so far
You'd play cards like Festering Goblin and Noxious Ghoul to wear out opposing forces, utilize Shepherd of Rot and Gempalm Polluter to knock down life, and use powerhouses like Undead Warchief, Soulless One, and Rotlung Reanimator to round out the package
The 1st edition stamp indicates that the card was part of the initial print run, making them more limited in quantity