How to Trade Up to Desert Eagle | Serpent Strike
Desert Eagle | Serpent Strike drops from Fever Case, so any contract that can produce it needs 10 Mil-Spec skins from that same case. Here is what the contract costs, what else it can land on, and the input float you need for each exterior.
- Odds per contract
- 20% 1 in 5
- Contract cost from
- $0.70 10 × cheapest input
- Expected value
- $0.43 mean of the outcome pool
- Margin
- -38.6% $-0.27 per contract
Buying is cheaper than rolling. A Field-Tested Desert Eagle | Serpent Strike costs $0.48 outright, against $0.70 for a contract with a 20% chance of producing one. Trade up for the process, not the value.
The contract
10 inputs, all Mil-Spec, all from Fever Case. Concentrating every input in one case is what keeps your odds at 20% — mixing cases splits the probability across both pools and lowers your chance at Desert Eagle | Serpent Strike specifically.
MAG-7 | Resupply
MP9 | Nexus
MP9 | Nexus
XM1014 | Mockingbird
P2000 | Sure Grip
XM1014 | Mockingbird
P2000 | Sure Grip
P2000 | Sure Grip
XM1014 | Mockingbird
MAG-7 | Resupply
MAG-7 | Resupply
USP-S | PC-GRN12 further eligible inputs are available — open the reverse trade-up calculator to price a full contract against your own inventory.
What else this contract can land on
A contract from Fever Case draws uniformly from every Restricted skin in the pool, so Desert Eagle | Serpent Strike is one of 5 equally likely results. These are the other 4.
| Outcome | Odds | Cheapest price |
|---|---|---|
| Desert Eagle | Serpent Strikeyour target | 20% | $0.48 |
| Galil AR | Control | 20% | $0.43 |
| Nova | Rising Sun | 20% | $0.43 |
| Zeus x27 | Tosai | 20% | $0.41 |
| P90 | Wave Breaker | 20% | $0.41 |
Input float for each exterior
CS2 normalises float across a trade-up: each input’s float becomes a 0–1 position inside its own range, those are averaged, and the average is applied to Desert Eagle | Serpent Strike’s range of 0.00–0.57. To land a given exterior, your ten inputs must average the normalised float below.
| Target exterior | Output float | Required avg. input float |
|---|---|---|
| Factory New | 0.0350 | 0.0614 |
| Minimal Wear | 0.1100 | 0.1930 |
| Field-Tested | 0.2650 | 0.4649 |
| Well-Worn | 0.4150 | 0.7281 |
| Battle-Scarred | 0.5100 | 0.8947 |
“Not reachable” means Desert Eagle | Serpent Strike’s own float range never enters that exterior band — no combination of inputs can produce it.
What Desert Eagle | Serpent Strike is worth right now
Worth comparing against the contract cost above before you commit: buying the skin outright is frequently cheaper than rolling for it.
| Exterior | Price | vs. contract cost |
|---|---|---|
| Field-Tested | $0.48 | −$0.22 |
| Battle-Scarred | $0.50 | −$0.20 |
| Well-Worn | $0.66 | −$0.04 |
| Minimal Wear | $0.77 | +$0.07 |
| Factory New | $1.67 | +$0.97 |
Build this contract
Price a full ten-slot contract against live inputs, set your own float values, and see the outcome odds update as you go.