Seen a half dozen times beginning in M14, the intensity thats created with the sun beaming through the trees is just stunning
Its Mega Brave attack hits for 270 damage, putting it in knockout range against most cards in the format
A lot of balance and care goes into choosing the cost of a card, more than I can express here, but looking for similar effects on existing Magic cards can give you an idea of a fair costfor example, a ramp spell that puts two lands into play ought to cost 4 mana, per Explosive Vegetation
As a result of this free stock pile of resources to tap into many of the most powerful cube cards in some way cost or use life up, and not just black card draw effects
While putting a +1/+1 counter on a land doesn't do anything to the land itself , Black Panther's other ability lets you put those +1/+1 counters onto a creature while gaining you a ton of life and drawing you a card
The deck wins by flooding the board with artifacts and then using combos and smart plays to keep your opponents on their toes