terraria health crystal easy way to find?

Answer 1

it's not hard to find them, if u have low level gear(copper and shackles) it's less hard to fight the monsters and you can find them around tier 2 underground(brown background with stones)

Answer 2

go to youre dungen on the left or right scrren be there by night talk to the old man AND KILL the BOSS then go in fight and there are TONS of cryses i got like 10