The best replacement for terra is raven.

The best alternatives to terra are rated as following:
★★★★★  raven
★★★★★  xehanort
★★★  zack
★★★  aqua
★★★  robin
★★  sora
★★  celes
★★  toph
★  braig
★  earth
★  zoo med terrarium
★  rolex datejust
★  conquest
★  young living
★  ventus
★  bare minerals
★  starfire
★  eraqus
  nikon monarch
  giga
  terra
  jeff glover
  riku
  amalfi coast
  trail

Your alternative for terra is not listed? Suggest!
Speaking about terra, one probably shouldn't forget about time splicer.

Other search terms related to terra and their ratings are:
★★★★★ time splicer
You have in mind a companion for terra and it is not yet here? Propose!



Google Trends

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terra
raven
xehanort