Gigantism is a promo card that can be used in Evolution or Climate by replacing a trait of your choice (all 7 copies) with Gigantisim (all 7 copies). The art is by John Ariosa and is it available only at the BGG store for a limited time.

Gigantism Text:
At the end of the Feeding Phase, gain 1 Body Size for every 3 food eaten.

For more information, visit the BGG listing.