Instead of just being the strongest or most efficient options, here are my five picks for Investigate cards that make the mechanic feel especially interesting, flavorful, and/or memorable: 5
They define cheap digging on the first turn, growing storm counts, trigger Spellslinger stuff like Guttersnipe and tons mores
Five of the most popular dual lands in history, the Shock Lands, are being reprinted in Standard
Nice and simple, but effective
If you can get a connive trigger the turn you do this, you might even be able to cheaply mayhem something from the graveyard once youre transformed
We need to play efficient low-cost creatures so that we can start attacking as quickly as possible