🐇 HareBrain 🧠

Case 1A: Single Hare Cast — Standard / No Offspring ($C = 1$)

The entering Hare triggers $A+1$ times. Each trigger sees $H$ other Hares and creates $H \times (3^O \cdot 2^T)$ Rabbit tokens:

$$X(H, T, A, O) = (A + 1) \cdot H \cdot (3^O \cdot 2^T)$$

Case 1B: Single Hare Cast — With Offspring Paid ({2})

The entering Hare triggers $A+1$ Offspring triggers and $A+1$ Make Rabbits triggers. Offspring resolves first, creating $P = 3^O \cdot 2^T$ token copies of Hare Apparent per trigger. Each token copy triggers its own ETB, and the original Hare resolves last seeing all new token Hares:

$$X_{\text{offspring}} = \sum_{n=1}^{A+1} \left[ P^2 \cdot (H + n \cdot P) \cdot (A + 1) \right] + (A + 1) \cdot P \cdot [H + (A + 1) \cdot P]$$

Case 2: Multiple Hares Entering Sequentially (Cast / Ripple via Thrumming Stone)

Each $k$-th entering Hare sees the cumulative total of existing Hares when its triggers resolve:

$$X_{seq}(H, C, T, A, O) = (A + 1) \cdot (3^O \cdot 2^T) \cdot \left[ C \cdot H + \frac{C(C - 1)}{2} \right]$$

Case 3: Multiple Hares Entering Simultaneously (Mass Reanimation)

All $C$ Hares enter together (e.g. Patriarch's Bidding, Raise the Past). Each of the $C$ Hares has $A+1$ triggers, and every trigger sees all other $H + C - 1$ Hares:

$$X_{sim}(H, C, T, A, O) = C \cdot (A + 1) \cdot (H + C - 1) \cdot (3^O \cdot 2^T)$$

Case 4: ETB Burn & Life Gain Synergy

Total entering creatures $E = C + \text{Offspring Hares} + X$. Every entering creature triggers burn to each opponent and lifegain:

$$\text{Damage to Each Opponent} = E \cdot D, \qquad \text{Life Gained} = E \cdot L$$