Sure, I can help you create a test case generator for the "Escape from the Hell" problem. Below is a Python function that generates random test cases for this problem.

```python
import random

def tcgen():
    # Generate random values for N and L
    N = random.randint(1, 10**5)
    L = random.randint(1, 10**9)
    
    # Generate the list of Ai, Bi, and Ci values
    A = [random.randint(1, 10**9) for _ in range(N)]
    B = [random.randint(1, 10**9) for _ in range(N)]
    C = [random.randint(1, 10**9) for _ in range(N)]
    
    # Prepare the input in the required format
    input_data = f"{N} {L}\n"
    for i in range(N):
        input_data += f"{A[i]} {B[i]}\n"
    for i in range(N):
        input_data += f"{C[i]}\n"
    
    return input_data

# Example usage
print(tcgen())
```

### Explanation:
1. **N and L Generation**:
   - `N` is generated randomly between 1 and 100,000 (inclusive).
   - `L` is generated randomly between 1 and 1,000,000,000 (inclusive).

2. **A, B, and C Lists Generation**:
   - `A` and `B` are lists of length `N` where each element is a random integer between 1 and 1,000,000,000 (inclusive).
   - `C` is a list of length `N` where each element is a random integer between 1 and 1,000,000,000 (inclusive).

3. **Input Formatting**:
   - The first line of the input is `N L`.
   - The next `N` lines contain pairs of `A[i]` and `B[i]`.
   - The following `N` lines contain `C[i]`.

This generator ensures that the generated test cases adhere to the problem constraints and are formatted correctly as required by the problem statement. You can run this function to get a new random test case each time.