Boom Shroom (Legendary) — Stats & Level-Up

⚡ Skill

Attacks all enemies to deal 40% damage. The Captain loses 4% of Max HP. Only the front-most enemy will be attacked if the Captain is below 4% HP.Attacks all enemies to deal 40% damage. The Captain loses 4% of Max HP. Only the front-most enemy will be attacked if the Captain is below 4% HP.Attacks all enemies to deal 40% damage. The Captain loses 4% of Max HP. Only the front-most enemy will be attacked if the Captain is below 4% HP.Attacks all enemies to deal 80% damage. The Captain loses 4% of Max HP. Only the front-most enemy will be attacked if the Captain is below 4% HP.

Lv 1–7 Rumble Chess (Lv 7)	Attacks all enemies to deal 40% damage. The Captain loses 4% of Max HP. Only the front-most enemy will be attacked if the Captain is below 4% HP.Attacks all enemies to deal 40% damage. The Captain loses 4% of Max HP. Only the front-most enemy will be attacked if the Captain is below 4% HP.Attacks all enemies to deal 40% damage. The Captain loses 4% of Max HP. Only the front-most enemy will be attacked if the Captain is below 4% HP.Attacks all enemies to deal 80% damage. The Captain loses 4% of Max HP. Only the front-most enemy will be attacked if the Captain is below 4% HP.
Lv 8	Attacks all enemies to deal 48% damage. The Captain loses 4% of Max HP. Only the front-most enemy will be attacked if the Captain is below 4% HP.Attacks all enemies to deal 48% damage. The Captain loses 4% of Max HP. Only the front-most enemy will be attacked if the Captain is below 4% HP.Attacks all enemies to deal 48% damage. The Captain loses 4% of Max HP. Only the front-most enemy will be attacked if the Captain is below 4% HP.Attacks all enemies to deal 96% damage. The Captain loses 4% of Max HP. Only the front-most enemy will be attacked if the Captain is below 4% HP.
Lv 9	Attacks all enemies to deal 54% damage. The Captain loses 4% of Max HP. Only the front-most enemy will be attacked if the Captain is below 4% HP.Attacks all enemies to deal 54% damage. The Captain loses 4% of Max HP. Only the front-most enemy will be attacked if the Captain is below 4% HP.Attacks all enemies to deal 54% damage. The Captain loses 4% of Max HP. Only the front-most enemy will be attacked if the Captain is below 4% HP.Attacks all enemies to deal 108% damage. The Captain loses 4% of Max HP. Only the front-most enemy will be attacked if the Captain is below 4% HP.
Lv 10	Attacks all enemies to deal 54% damage. The Captain loses 3% of Max HP. Only the front-most enemy will be attacked if the Captain is below 3% HP.Attacks all enemies to deal 54% damage. The Captain loses 3% of Max HP. Only the front-most enemy will be attacked if the Captain is below 3% HP.Attacks all enemies to deal 54% damage. The Captain loses 3% of Max HP. Only the front-most enemy will be attacked if the Captain is below 3% HP.Attacks all enemies to deal 108% damage. The Captain loses 3% of Max HP. Only the front-most enemy will be attacked if the Captain is below 3% HP.
Lv 11	Attacks all enemies to deal 66% damage. The Captain loses 3% of Max HP. Only the front-most enemy will be attacked if the Captain is below 3% HP.Attacks all enemies to deal 66% damage. The Captain loses 3% of Max HP. Only the front-most enemy will be attacked if the Captain is below 3% HP.Attacks all enemies to deal 66% damage. The Captain loses 3% of Max HP. Only the front-most enemy will be attacked if the Captain is below 3% HP.Attacks all enemies to deal 132% damage. The Captain loses 3% of Max HP. Only the front-most enemy will be attacked if the Captain is below 3% HP.
Lv 12	Attacks all enemies to deal 80% damage. The Captain loses 3% of Max HP. Only the front-most enemy will be attacked if the Captain is below 3% HP.Attacks all enemies to deal 80% damage. The Captain loses 3% of Max HP. Only the front-most enemy will be attacked if the Captain is below 3% HP.Attacks all enemies to deal 80% damage. The Captain loses 3% of Max HP. Only the front-most enemy will be attacked if the Captain is below 3% HP.Attacks all enemies to deal 160% damage. The Captain loses 3% of Max HP. Only the front-most enemy will be attacked if the Captain is below 3% HP.

Drag two Minions of the same type and ★ rank onto the same tile on the board to promote them to the next ★; their ATK is added together. Minions go up to 3★ (Merge Minion); only in Rumble Chess do two 3★ Minions merge into a 4★ (Rumble Chess – 4★ Minions).

Moon Synergy (Rumble Chess Synergy)

Other heroes in this synergy

Jack-o'-Licks

Greenkeeper

Sir Rose I

Headless Jack

Leafy Trap

Berrinetta

Wicked Mirror

Valkyris

Rosen Death

Synergy bonuses

Synergy Points	Effect
4	Enemies lose 4% HP upon entering the field.
8	Enemies lose 8% HP upon entering the field.
12	Enemies lose 12% HP upon entering the field.
16	Enemies lose 18% HP upon entering the field.
20	Enemies lose 24% HP upon entering the field.
25	Enemies lose 30% HP upon entering the field.
30	Enemies lose 38% HP upon entering the field.
35	Enemies lose 46% HP upon entering the field.
40	Enemies lose 54% HP upon entering the field.
50	Enemies lose 65% HP upon entering the field.

📈 Level-Up Costs (Lv 7–12)

Level	ATK gained	Cards	Gold	Effect
Level 7	—	-	-	Starting level
Level 8	—	🃏 1 Cards	🪙 2000	Increases damage to 48%.
Level 9	—	🃏 2 Cards	🪙 4000	Increases damage to 54%.
Level 10	—	🃏 4 Cards	🪙 7000	Reduces HP lost by the Captain to 3%.
Level 11	—	🃏 5 Cards	🪙 11000	Increases damage to 66%.
Level 12	—	🃏 6 Cards	🪙 16000	Increases damage to 80%.