The card draw and sacrifice effects are far more relevant
This doesnt mean they arent good, it just means they arent winning most of their games on raw card quality
It is one of the best Izzet tokens commander, as it turns your token generators like Young Pyromancer, and utility creatures like Archmage Emeritus and Storm-Kiln Artist into swollen rage monsters
many of these cards were handled and played with, causing tiny surface scratches, bent edges and other types of damage to the card that would devalue it
While the markdown percent isn't as significant as it is with Gaea's Cradle and Survival of the Fittest, the World Championships versions of these cards still offer a 20-50% discount to their original, black-bordered counterparts
If an activated ability of a creature you control costs no generic mana to activate (for example, if it costs , it costs, or it costs only nonmana actions such asor "Sacrifice a creature"), Training Grounds simply won't affect it