Prioritize safe (Q) farming and use your passive to block Ornn's key crowd control to survive early pressure.
This is a scaling vs scaling lane where Mundo must avoid extended early trades and focus on outlasting Ornn with health regeneration and item durability.
Trading pattern
Trade only when (Q) lands repeatedly and your passive can block Ornn's engage; avoid trades if (Q) misses.
Respect Ornn's terrain setups for (E) knockup and avoid fighting near his (Q) pillar.
Use (R) proactively before Ornn's burst to sustain through trades and keep moving to maximize healing.
Danger windows
Be cautious when your passive is down, as Ornn's crowd control can lock you down for follow-up damage.
Avoid extended trades before level 6 when your healing is limited and Ornn can punish with (E) knockup.
Watch for (R) long-range engage and keep movement options to dodge the second cast.
Early game
Focus on landing safe (Q) cleavers to farm and poke without missing to avoid giving Ornn free trades.
Avoid extended fights before level 6 when your healing and durability are lower.
Use your passive to absorb Ornn's single crowd control attempt and punish cooldown windows.
Power spikes
At level 6, use (R) before Ornn's burst to heal and chase, forcing him to disengage or kite.
After your first health item, pressure side waves to force Ornn to spend time cutting through your durability.
Respect Ornn's level 6 (R) engage and his tank item spikes by avoiding all-ins without your healing and cooldowns ready.
Win conditions
Survive early lane by farming safely with (Q) and passive crowd control block to reach your health and item spikes.
Use (R) and health scaling to absorb damage in side lanes and front-to-back fights, outlasting Ornn's burst.
Pressure side waves post-health item to deny Ornn free scaling and force him into unfavorable trades or wave states.
Tip: For Dr. Mundo vs Ornn, read overview, trading pattern, and danger windows first for a fast Top lane check.
