Upgrade!

Upgrade! is a rare warrior spell card, inducted into the Legacy set, formerly from the Classic set.

Previous availability

 * Regular Upgrade! could also be obtained as a first-time reward for first time reaching Silver 10 and Gold 10 in Ranked mode from April 1, 2020 to March 25, 2021 (or as a reward of Climbing the Ranks (2/10) and (4/10) achievements).

Strategy
This is an efficient source of damage for warrior decks in the early game. In the late game, when combined with cards like Gorehowl, with its incredibly high Attack and only 1 Durability, this card can become a game changer, giving you up to 9 additional damage to the enemy hero for only 1 mana.

Trivia

 * The artwork for this card comes from the World of Warcraft Trading Card Game "March of the Legion" series, for the card.
 * If played to give +1/+1 to a weapon while having the Hero Magni Bronzebeard equiped, Magni says "Heat of the forge" (Found with the launch of Rise of Shadows)

Patch changes

 * Moved from Classic to Legacy set.