Regeneration [International Collectors' Edition] Phyrexian Dragon Skeleton any time you could activate

any time you could activate a mana ability

Players can't cast spells during combat

Sacrifice Inventors' Fair: Search your library for an artifact card

−2: Create a 4/4 red Dragon creature token with flying

and we can use that to our advantage

Regeneration [International Collectors' Edition] Phyrexian Dragon Skeleton any time you could activateSet: International Collectors' Edition Type: Enchantment Aura Rarity: Common Cost: {1}{G} Enchant creature (Target a creature as you cast this. This card enters the battlefield attached to that creature.) {G}: Regenerate enchanted creature. (The next time that creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)