mtg aetherdrift most expensive cards The 30 and Must-Have in Draw two cards Top 10 Most Valuable MTG

This is especially true for cards that also make permanents, like Herd BalothHerd Baloth or Basking BroodscaleBasking Broodscale

If that is not enough a light test or looking at the card through a loupe (or scanning the card at 1200dpi) are the safest methods (at the end of the post)

It offers versatile mana fixing based on the lands you have in play

Being able to sacrifice merfolk to counter noncreature spells is very strong, especially when played with cards like Deeproot Waters that create merfolk tokens

Candelabra of tawnos: allowed you to abuse the powerful lands too easily (mishra's workshop and library of alexandria in particular)

Lots, I say