The "If your opponent controls 2 or more monsters and you control no monsters, you can Special Summon this card (from your hand)." effect does not start a Chain Link.
The "If this card is Normal or Special Summoned: You can target 1 Level 4 or lower "Superheavy Samurai" monster in your Graveyard, except "Superheavy Samurai Scales"; Special Summon it in Defense Position." effect is an optional Trigger Effect. (It targets 1 Level 4 or lower "Superheavy Samurai" monster in your Graveyard. It can be activated during the Damage Step.)