I’m not a WoW TCG player, but I can tell you for certainty this is a card YOU … MUST … HAVE. It will be part of the World of Warcraft TCG: Worlbreaker, Twilight of the Dragons set. Here is an article from the official WoW TCG that explains the importance and role of this card.
The article explains how you can combine Wild Growth for a Mend effect plus use Twinned Band of Flowers, Nourish, Faith Healer’s Boots or Apply this Twice a Day and other combos that trigger self-damage on your allies to make Wild Growth and other abilities to kick in.
Would you like to heal all of your cards at once, and a bit more over time to full health? Whoa? Fetch it, boy!