zendikar booster box mtg Rising 15 cards from the set designed for a balanced Draft experience plus an ad card or token MtG Battle for Zendikar Holiday

Once it enters play, you may pay one life to add a mana of any color

Then you can spend six mana ad nauseum to make a 1/1 Soldier creature copy of any artifact you control, like the aforementioned Spine of Ish Sah or Mycosynth Wellspring or even just a Sol Ring or Gilded Lotus

Blade of Selves for example on Reyhan is a commander damage kill as early as turn 3 (turn 1: land, sol ring, Blade of Selves

If I really want to play the role of generous mana-giver, I look at cards like Spectral Searchlight and Victory Chimes, which are generic mana rocks that can also gift mana to your opponents

I think this is just a really stylish belt