Unstable Obsidian
, also known as Spicicle, is a fusion plant.
absorbs damage for all plants on screen, subtracting it from its massive 32000 health pool. After being fused, will slowly lose health, at a rate of 20% of max HP per 3 seconds.
Combat Stats
Damage
1800
Attack Speed
12 Seconds
Range
In front
Target
Grounded and Water Zombies
Toughness
32000, lose 20% of max HP per 3 seconds
Details
Unstable Obsidian is unlocked through Odyssey mode with no sun cost, holds 32000, lose 20% of max HP per 3 seconds toughness, and attacks every 12 Seconds covering In front dealing 1800 to Grounded and Water Zombies zombies. Its inherited parent-plant traits produce a combat profile optimized for consistent lane pressure without requiring specific zombie matchups or special conditions to perform.
Its generalist reliability makes it a practical choice for any level where you need a dependable lane occupant without the resource commitment of specialized premium fusions. Supporting it with a wall plant in front unlocks its full potential across sustained multi-wave runs.
Pros
- Reliable damage floor — 1800 per every 12 Seconds provides consistent, predictable pressure throughout every wave.
- Broad applicability — No special conditions needed; performs in virtually every level type.
- Fusion heritage — Parent-plant traits create a more complete attacker than either plant alone.
Cons
- No specialist peak — Cannot match the ceiling output of specialized fusions in their ideal matchup.
- Protection dependent — 32000, lose 20% of max HP per 3 seconds needs at least one defensive plant in front for sustained multi-wave use.
- Endgame limitations — Specialist and premium fusions eventually outpace Unstable Obsidian in advanced content.
1
Place Unstable Obsidian in the lane with the first and most consistent zombie arrivals so its attack cycle stays active and impactful from wave one onwards.
2
A wall plant at the front of the same lane ensures Unstable Obsidian fires uninterrupted from a protected position across multiple wave cycles.
3
Check which Lumos bonuses are active in your current run — matching damage types can materially increase Unstable Obsidian's effective output without any additional sun investment.
4
Memorize Unstable Obsidian's parent-plant recipe so you can replant it instantly mid-wave if it falls without losing focus during a heavy zombie push.
What is Unstable Obsidian and how does it work?
Unstable Obsidian is a Common fusion in Plants vs Zombies Fusion 3.9, created by merging two specific base plants. Common fusions like $name are accessible, versatile, and useful across all stages of the game. It attacks every 12 Seconds covering In front, dealing 1800 to Grounded and Water Zombies zombies with 32000, lose 20% of max HP per 3 seconds toughness.
Does Unstable Obsidian require sun to plant?
No — Unstable Obsidian is an Odyssey-exclusive fusion with no sun cost. It is unlocked through Odyssey mode gameplay rather than purchased with sun on the main lawn.
What are Unstable Obsidian's strengths in PvZ Fusion?
Unstable Obsidian's primary strengths are its 1800 damage output and 32000, lose 20% of max HP per 3 seconds toughness. These attributes combine with parent-plant traits to make it a reliable, adaptable choice for a wide variety of lane setups.
What zombies is Unstable Obsidian best against?
Unstable Obsidian is most effective against Grounded and Water Zombies zombies given its covering In front attack coverage. In levels where those zombie types are frequent, placing Unstable Obsidian in the lane they favor extracts the maximum possible return from its attack cycle.
