"Junk Synchron" + 1 or more non-Tuner monsters
If this card is Synchro Summoned: It gains ATK equal to the total ATK of all Level 2 or lower monsters you currently control.
|Pack||Structure Deck: Synchro Connection [UR]|
You will need to use this specific monster along with a level 2 monster to Synchro summon into Junk Warrior. Fortunately Junk Synchron has the effect of special summoning a level 2 or lower monster from your graveyard which you can use as Synchro material or to boost Junk Warrior's attack.
Here are some level 2 monsters which Junk Warrior can gain attack from. Although they are low-leveled these monsters in particular have effects that help them gain more attack. The Calculator gains attack from the level of all monsters you control. With Junk Warrior and himself on the field thats 2100 attack. Copycat and Relinquished's attack depends on the monster your opponent has on the field.
Paleozoic monsters can be special summoned as level 2 monsters with 1200 attack. Boost them with Wetlands and Junk Warrior could easily be boosted by 2400 attack for each Paleozoic monster you control.
Use these cards to boost the attack of your low-leveled monsters which in turn would also boost the attack of Junk Warrior.
|Stat changes||This card gains ATK|
The White Dragon of Legend
Ancient Gear Awakening
Return of the Red-Eyes
Full Metal Desperado
Master of Chaos