Gain an empty Mana Crystal.
Grow your own mana crystals with this Mana Crystal Growth Kit, only 39.99!
 How to get
Wild Growth x 2 are automatically included in all players' collections.
The mana crystal you gain is permanent. Effects like Wild Growth are often referred to as a "mana ramp", as they allow you to quickly ramp up to higher costing-cost cards.
Wild growth has a secondary function when a player reaches their mana crystal maximum. If cast when the player has 10 mana crystals, it will place the Excess Mana card in their hand. They can use this to draw a card for free. This is designed to ensure that Wild Growth remains useful even later in the game, when you already have maximum mana.
Wild Growth is a targeted AoE druid heal over time spell from World of Warcraft. It heals several of the most injured allies within 30 yards of the selected target, healing quickly at first and slowing down as it reaches its full duration.
In the collectible card game Magic: The Gathering, 'Wild Growth' is a long-present, basic nature-themed mana acceleration spell, serving a near-identical purpose to its Hearthstone counterpart.
Also in Magic: The Gathering, 'Rampant Growth' is a spell that functions exactly like Hearthstone's Wild Growth, costing 2 mana and granting the user a tapped land (equivalent to an empty mana crystal). 'Rampant Growth's' name and use also inspired the Ramp type decks both in MTG and Hearthstone.
- Ben Brode on Twitter. (2014-05-22).