🟢 Verified Guide • Convergence Econ Analytics Society • 7 min read

TFT Set 13 Strategy: Fast 8 Rolling Odds, 4-Cost Probability & Bag Sizes

undefined

Published by Convergence Econ Analytics Society • Updated for 2026 Season

📋 Step-by-Step Instructions

Step 1: Analyze the Level 7 vs Level 8 Odds Shift

At Level 7, each shop slot has only a 10% chance to roll a 4-cost champion. At Level 8, that probability jumps to 25% (a 2.5x increase), while unlocking 5% legendary odds. Spending 40 gold to roll down at Level 7 gives inferior value compared to pushing Level 8 on Stage 4-2.

Step 2: Calculate Expected Gold for a 2-Star 4-Cost Champion

With 50 gold (25 rolls = 125 shop slots), the binomial probability of seeing at least 3 copies of an uncontested 4-cost champion at Level 8 is ~82.4%. Always aim to reach Level 8 with at least 40-50 gold in the bank so you can upgrade both your frontline tank and backline carry.

Step 3: Track Shared Champion Pool Bag Sizes & Contestation

Set 13 has strict pool sizes: 10 copies of each 4-cost, and 9 copies of each 5-cost. If two other players are holding 3 copies of your target 4-cost, only 4 copies remain in the entire game. In this scenario, your chance of hitting drops by nearly 50%, signaling an immediate need to pivot.

Step 4: Execute the Fast 9 Win-Streak Transition

If you win-streak through Stage 3 and early Stage 4 with strong tempo, do not roll down at Level 8. Instead, push Level 9 on Stage 5-1. Level 9 features 35% 4-cost and 10% 5-cost odds, allowing you to cap your board with 2-star legendaries to guarantee a 1st place finish.

🛠️ Interactive In-Browser Gamer Tools

Test, convert, and benchmark your gaming settings right in your browser:

🎯 Crosshair Canvas Studio 📐 Universal Sens & eDPI Converter ⛏️ Nether & Chunk Calc ⚡ Reaction & CPS Test 🎡 Squad Map Picker Wheel

❓ Frequently Asked Questions

What should I do if my 4-cost carry is heavily contested in TFT Set 13?

Scout on Stage 4-1. If 4 or more copies of your primary carry are already held by opponents, roll down at Level 8 for an uncontested secondary carry that shares the same offensive traits or itemization (e.g. AP caster pivot or AD sniper pivot).

Is it worth rolling on Level 9 for 3-star 4-cost champions?

Yes. Level 9 offers a 35% chance per slot for 4-cost units. If you are uncontested and have accumulated 50+ gold after stabilizing, slow-rolling on Level 9 is the safest path to hitting an unstoppable 3-star 4-cost game ender.

📚 More Popular Gaming Guides