how to pick a planet

Belinda's petition.

3/1/4/1/5/9 palindrome:

Farm sale trifle auctioneer
if let Salem far.

pairs:

Aorta imp:
I impair Tao.

triplets:

urn arbor, crazy on yon
razor car burn

pairs again:

story war we go
armed, O do me Argo
weary worst

regular one:

Erupt, O Grail, aha!
--Hali argot pure.

I need a word between schadenfreude & stark terror.