The Monstrous basilisk is a superior variant of the Basilisk. It has a chance of spawning once after purchasing the unlock Bigger and Badder for 150 Slayer reward points from any Slayer master.
Similar to their lower-level counterparts, a mirror shield or V's shield is required to safely engage them, as otherwise the player will take rapid damage and have their stats drained.
In addition to 100% drops and tertiary drops, superior slayer monsters will always roll 3 additional items, of which only 1 roll may be from the superior unique table. The other rolls are performed on the regular counterpart's table; their displayed drop chances represent a single roll.
Drop rates estimated based on 48,470 kills from the Drop Rate Project, unless otherwise cited.
The average Monstrous basilisk kill is worth 39,734.33.
The average Monstrous basilisk kill while on a Konar task is worth 41,039.61.
| Item |
Quantity |
Rarity |
Price |
High Alch |
 | Bones | 1 | Always | 137 | 0 |
There is a 35/128 chance of rolling the herb drop table.
The overall chance of rolling a coin drop is 57/128 with an average value of 102.
| Item |
Quantity |
Rarity |
Price |
High Alch |
 | Coins | 44 | 3 × 29/128 | 44 | 44 |
 | Coins | 200 | 3 × 17/128 | 200 | 200 |
| Coins | 132 | 3 × 5/128 | 132 | 132 |
 | Coins | 11 | 3 × 5/128 | 11 | 11 |
 | Coins | 440 | 3 × 1/128 | 440 | 440 |
There is a 5/128 chance of rolling the gem drop table.
| Item |
Quantity |
Rarity |
Price |
High Alch |
 | Nothing | N/A | 3 × 1/51.29; Never[d 1] | N/A | N/A |
 | Uncut sapphire | 1 | 3 × 1/102.4; 1/52[d 2] | 409 | 15 |
 | Uncut emerald | 1 | 3 × 1/204.8; 1/104[d 2] | 658 | 30 |
 | Uncut ruby | 1 | 3 × 1/409.6; 1/208[d 2] | 1,296 | 60 |
 | Chaos talisman | 1 | 3 × 1/1,092.27; 1/554.67[d 2] | 565 | 2 |
 | Uncut diamond | 1 | 3 × 1/1,638.4; 1/832[d 2] | 2,529 | 120 |
 | Loop half of key | 1 | 3 × 1/3,276.8; 1/1,664[d 2] | 9,839 | 60 |
 | Tooth half of key | 1 | 3 × 1/3,276.8; 1/1,664[d 2] | 9,832 | 60 |
 | Rune javelin | 5 | 3 × 1/3,276.8; 1/1,664[d 2] | 885 | 1,200 |
 | Rune spear | 1 | 3 × 1/52,428.8; 1/3,120[d 2][d 3] | 11,898 | 12,480 |
 | Shield left half | 1 | 3 × 1/104,857.6; 1/6,240[d 2][d 3] | 65,269 | 66,000 |
 | Dragon spear | 1 | 3 × 1/139,810.13; 1/8,320[d 2][d 3] | 37,687 | 37,440 |
| Item |
Quantity |
Rarity |
Price |
High Alch |
 | Mist battlestaff | 1 | 1/292.1 | 97,243 | 9,300 |
 | Dust battlestaff | 1 | 1/292.1 | 23,658 | 9,300 |
 | Eternal gem | 1 | 1/1,022.4 | 7,432,412 | 5,700 |
 | Imbued heart | 1 | 1/1,022.4 | 30,632,848 | 300,000 |
- The monster's examine text is a reference to the Harry Potter series, in which phoenix tears are one of the only cures for a basilisk's powerful venom. However, basilisks in RuneScape aren't poisonous.
Slayer info
Combat stats
