This is a control vs teamfight matchup where Sion must manage wave control and health scaling to outlast Tahm Kench's short trades.
Sion should avoid giving Tahm Kench passive short trades to build stacks and instead focus on stable farming and threatening charged (Q) from fog or brush.
Trading pattern
Use (E) slow to set up charged (Q) knockups from hidden angles and punish Tahm Kench when his passive stacks are low.
Avoid trading into Tahm Kench when his passive is near three stacks to reduce stun risk.
Punish Tahm Kench after he misses (Q) or when (W) shield is down by stepping forward for trades.
Danger windows
Respect Tahm Kench's threat when his passive stacks reach three, enabling (Q) stun and (R).
Avoid all-ins when (R) is available on Tahm Kench as he can isolate or save targets.
Be cautious trading when (W) shield is down or after a missed (Q) charge, as your threat temporarily drops.
Early game
Focus on farming safely and stacking (W) health shield to survive Tahm Kench's short trades.
Use (E) to slow and set up charged (Q) from fog angles rather than obvious lanes.
Avoid committing to trades when (W) shield is down or (Q) is on cooldown to prevent losing health to Tahm Kench's sustained damage.
Power spikes
At level 6, use (R) with clear paths to force fights or return to lane with pressure; avoid predictable engage angles.
After first tank item and with high health scaling from (W), absorb damage and threaten charged (Q) zones.
Respect Tahm Kench's level 6 (R) cooldown and his first tank item durability to avoid lethal trades.
Win conditions
Maintain wave control to farm and stack (W) health shield, becoming a durable front line.
Use fog or brush to land charged (Q) knockups and initiate fights with (R) when teammates can follow up.
Deny Tahm Kench passive stack buildup by forcing trades only when his stacks are low and punishing cooldowns to prevent his short trade pattern.
Tip: For Sion vs Tahm Kench, read overview, trading pattern, and danger windows first for a fast Top lane check.
