Its a cut from the Magic The Gathering card "Upwelling". Art by Chippy.
I think it looks wonderful, I used to use the full version as my wallpaper, which I'll probably be doing again soon.
<spoiler=Full card art>
The card itself is a rare Enchantment.
Its ability is pretty nice too.
Mana pools don't empty at the end of phases or turns.
In mtg, land cards are tapped to add mana to your pool, which you can then use to play other cards. Lands can only be tapped once per turn, and untap at the beginning of your next turn. At the end of turns the pools empty.
It used to stop mana burn too, but that doesn't exist any more.
I think it looks wonderful, I used to use the full version as my wallpaper, which I'll probably be doing again soon.
<spoiler=Full card art>

The card itself is a rare Enchantment.
Its ability is pretty nice too.
Mana pools don't empty at the end of phases or turns.
In mtg, land cards are tapped to add mana to your pool, which you can then use to play other cards. Lands can only be tapped once per turn, and untap at the beginning of your next turn. At the end of turns the pools empty.
It used to stop mana burn too, but that doesn't exist any more.