Mormolith
Rock / Effect
EARTH / 
4You can Tribute 1 face-up EARTH monster to destroy all face-up monsters with DEF equal to or less than the ATK of the Tributed card.
1000/900
CARD ID: 71717923
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| TCG Set | Symbol | Rarity | Low | Avg | Trend | |
|---|---|---|---|---|---|---|
| Gold Series 4: Pyramids Edition | GLD4-EN021 | Common | -,--€ | -,--€ | -,--€ | |
| Tactical Evolution | TAEV-EN085 | Secret Rare | -,--€ | -,--€ | -,--€ |
This card's effect is similar to that of Burst Breath, by criteria of monster destroyed. The differences are the effect types (Normal Trap vs not once-per-turn Ignition Effect) and the criteria of the Tribute required (Dragon vs EARTH).
OCG Rulings
Tributing 1 face-up EARTH monster is a cost to activate this effect.: Effect Monster > Mormolith
Compare the monsters' DEFs to the Tributed EARTH monster's current ATK at the time when the monster was Tributed. This includes modifications from Equip Cards, etc.: When Tributing a monster for "Mormolith"s effect, when do you refer to the monster's ATK?