Step 1. Activate Union Hangar, and use its effect to add B-Buster Drake to your hand
Step 2. Normal Summon B-Buster Drake
Step 3. Set Symphonic Warrior Guitaar in the Pendulum Zone, then activate its effect to special summon Symphonic Warrior Miccs from the deck (And Discarding a card)
Step 4. Link Summon Platinum Gadget using Buster Drake and Miccs
Step 5. Using B-Buster Drake's graveyard effect, add Heavy Mech Support Armor to your hand
Step 6. Normal Summon Heavy Mech Support Armor using Miccs's effect
Step 7. Using Heavy Mech Support Armor's effect, special summon B-Buster Drake from the graveyard
Step 8. Using Union Hangar's effect, attach A-Assult Core to Heavy Mech Support Armor
Step 9. Link Summon a Link 2 Monster using B-Buster Drake and Heavy Mech Support Armor
Step 10. Using A-Assault Core's effect, add B-Buster Drake back into your hand
Step 11. Using B-Buster Drake's effect, add C-Crush Wyvern to your hand
Step 12. Activate Platinum Gadget's effect, special summoning C-Crush Wyvern Drake from the hand
Step 13. Link Summon A Link 3 Monster Using C-Crush Wyvern and the Link 2
Step 14. Using C-Crush Wyvern's effect, special summon B-Buster Drake from hand
Step 15. Link Summon a Link 4 Monster using B-Buster Drake and the Link 3
Step 16. Contact Fusion Summon Summon ABC-Dragon Buster using Assault Core, Buster Drake, and Crush Wyvern in your graveyard.