Ojer Kaslem dies, it triggers, returning itself from your graveyard to the battlefield as Temple of Cultivation.
When Temple of Cultivation enters the battlefield,
Amulet of Vigor and
Nissa trigger.
Resolve the
Amulet of Vigor trigger, untapping Temple of Cultivation.
Resolve the
Nissa trigger, adding ({G} magic symbol) .
Activate Temple of Cultivation's second ability by paying ({2} magic symbol) ({G} magic symbol) and tapping it, transforming Temple of Cultivation into