Kronos Apprentice, Ogle (Rulings)

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 * Member of the "Kronos" Archetype.
 * " If this card is Special Summoned: You can send 1 “Kronos” card from your Deck to the Graveyard. " is a Trigger Effect.  This effect does not target. It can be activated even if this card is Special Summoned by a method other than Synchro Summon. It can be activated during the  Damage Step.
 * " When using this card as Synchro Material, you can use 1 “Kronos” monster from your Extra Deck as 1 of the Synchro Materials. " is an Unclassified Effect, it does not target. Both monsters face-up and face-down in the Extra Deck can be used. Xyz Monsters cannot be used since they lack a Level.
 * " If this card is banished: You can banish 2 “Kronos” cards from your Graveyard; return this card to the Extra Deck. " is a Tigger Effect. It does not target, banishing 2 "Kronos" cards from the Graveyard is a cost. This card will return to the Extra Deck even if it's moved to another place before this effect resolves.
 * " You can only Special Summon “Kronos Apprentice, Ogle(s)” once per turn. " is a Condition. If the Special Summon of this card is negated, then another copy can still be Summoned the same turn.