Undergrowth is a Treasure Hunter promotion released in April 2019. Undergrowth will run from 00:00 on April 11th to 23:59 on April 15th. Similar to the Buried Treasure promotion, the player may choose one tile per Treasure Hunter key on a grid of 36 tiles shown in the Treasure Hunter interface.

The Undergrowth Treasure Hunter Promo
As the latest Treasure Hunter promotion, The Undergrowth RuneScape is active now and runs until 23:59 game time on April 15, 2019. During this period, the five chests are replaced with a grid in the interface, and you choose one tile per Treasure Hunter key to win the new Cottontail Knight prizes.

Choosing any tile may occasionally reveal the gem rarity or a multiplier for another tile. Revealed tiles stay visible until chosen or the grid is reset. The grid can be reset when all the tiles are either cleared or revealed during The Undergrowth RuneScape TH promotion.
 
New RuneScape Cottontail Knight Armour
During this TH promo, you are able to gain Cottontail knight tokens and the Carrot lance token, which can be used for the new RS Cottontail Knight Armour and Carrot lance.
You have a chance to gain some Cottontail knight tokens, which can be used to unlock the new RuneScape Cottontail Knight Armour (consisting of the helmet, chestplate, gauntlets, legplates and boots).
Cottontail Knight helmet: unlocked by Cottontail Knight helmet token
Cottontail Knight chestplate: unlocked by Cottontail knight upper body token
Cottontail Knight gauntlets: unlocked by Cottontail knight upper body token
Cottontail Knight legplates: unlocked by Cottontail knight lower body token
Cottontail Knight boots: unlocked by Cottontail knight lower body token

In addition, there is also a chance to get the Carrot lance token during this promotion. The Carrot lance token  can be consumed to unlock RuneScape Carrot lance, a new two-handed melee override. The Carrot lance can be paired with RuneScape Cottontail Knight Armour.

The Rs2hot Team