Trazyn the Infinite gains only activated abilities. It doesn't gain keyword abilities (unless those keyword abilities are activated), triggered abilities, or static abilities.

Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keywords are activated abilities; they have colons in their reminder text.

If an activated ability of a card in a graveyard references the card it's printed on by name, treat Trazyn the Infinite's version of that ability as though it referenced Trazyn the Infinite by name instead.