Yu-Gi-Oh! Duel Links: How to Summon Timaeus the Knight of Destiny

To summon Timaeus the Knight of Destiny in Yu-Gi-Oh! Duel Links, resolve the Normal Spell Legend of Heart to Special Summon the three required Legendary Knights, then immediately activate Polymerization to fuse them. Because Duel Links uses the Speed Duel format with only three Main Monster Zones, all three zones will be filled by the Knights, requiring Polymerization to clear the board and bring out Timaeus.

Required Cards for the Combo

Timaeus the Knight of Destiny cannot be Special Summoned by other methods and requires exact named materials. Fusion substitute monsters such as King of the Swamp cannot replace any of the required materials.

Card Name	Card Type	Role in Summon Sequence
Timaeus the Knight of Destiny	Extra Deck Fusion Monster	Boss monster requiring all three specific Legendary Knights
Legendary Knight Timaeus, Critias, Hermos	Level 8 Effect Monsters	Exact fusion materials; summoned solely by Legend of Heart
Legend of Heart	Normal Spell	Tributes one face-up Warrior and banishes three Dragons to summon the Knights
The Eye of Timaeus, The Fang of Critias, The Claw of Hermos	Normal Spells	Banished from the hand or Graveyard to satisfy Legend of Heart
Polymerization	Normal Spell	Sends the fielded Knights to the Graveyard to execute the Fusion Summon

Managing Speed Duel Board Space

Duel Links provides only three Main Monster Zones and three Spell & Trap Zones. When Legend of Heart resolves, it Special Summons Legendary Knight Timaeus, Legendary Knight Critias, and Legendary Knight Hermos at the same time. This action completely fills your monster zones.

Zone turnover allows the summon to succeed:

Activating Legend of Heart occupies one Spell & Trap Zone.
Once the spell finishes resolving, it is sent to the Graveyard, reopening that backrow slot.
Provided you have not filled your backrow with other set cards, you can activate Polymerization in the newly opened zone.
Polymerization sends all three fielded Knights to the Graveyard as Fusion Material, clearing the monster zones so Timaeus the Knight of Destiny can enter the field legally.

Step-by-Step Summoning Sequence

Executing the combo requires stocking your Graveyard with the three Legendary Dragon Spells before committing your field tribute.

Send the Dragons to the Graveyard: Discard or resolve The Eye of Timaeus, The Fang of Critias, and The Claw of Hermos early to move them into your Graveyard.
Summon a Warrior Tribute: Normal Summon any low-level Warrior-type monster while maintaining more than 1000 Life Points.
Keep Backrow Space Open: Ensure at least one Spell & Trap Zone remains empty so you can cast Polymerization.
Activate Legend of Heart: Pay 1000 Life Points, tribute your face-up Warrior, and banish the three Dragon spells from your hand or Graveyard to Special Summon all three Legendary Knights.
Resolve Polymerization: Fuse the three fielded Knights to send them to the Graveyard and Fusion Summon Timaeus the Knight of Destiny from your Extra Deck.

Playing this sequence with Yami Yugi triggers unique summoning dialogue and voice lines dedicated to the fusion.

On-Field Effects and Strategic Weaknesses

Once on the field, Timaeus the Knight of Destiny is permanently unaffected by other card effects. This protects it from standard removal and disruption such as Book of Moon, Compulsory Evacuation Device, and Warning Point. During damage calculation in either player's battle phase, you can activate its effect to match the highest attack power on the field, enabling it to fight through high-stat monsters. If Timaeus is destroyed by battle, its effect allows you to Special Summon all three Legendary Knights from your hand, Deck, or Graveyard, ignoring their summoning conditions.

The primary weakness of this strategy is deck consistency. Drawing high-level Legendary Knights early creates dead cards in hand, while Legend of Heart demands heavy resource investment. If an opponent negates Legend of Heart with a counter like Solemn Scolding, the tribute and Life Point costs are lost without fielding the materials. To stabilize the setup, run draw engines like Dark World Dealings to discard dragons quickly, and use Yami Yugi's Destiny Draw skill after taking damage to search for either Legend of Heart or Polymerization.