How did you obtain your first keymold?

[Fruitbat]

I killed a corrupter and got a corruption keymold, then directly after that I killed a slimling from a corrupt slime and got another

I killed a jungle bat (no offence @Fruitbat ) and got my key mold.

it's okay as long as you're sorry

 

[Cubicality]

I was just around in the Hardmode Undergound Snow, because there's pretty good loot there, which most people don't know. I had my Frozen Turtle Shell, Frostbrand, and Ice Bow, but what I really wanted was an Ice Sickle. Then I wander into a corrupted part, kill another now useless Icy Merman, and there one is. 30 seconds later, I kill an Ice Mimic, and I get another. But I never did get my Ice Sickle...

 

[PTpirahna]

Running to my underground hallow which was next to a jungle. After that I killed a random enemy and it dropped a jungle key mold.

 

[ibakedpotato]

I was farming for hallowed key mold and I didn't get a key mold then I went to the jungle to try and get the axe and the second I walked into the jungle I killed a jungle bat and it dropped a jungle key mold.woooooooooooooow

 

[Thebeatbat1139]

@MegaMage314

 

[Antonok]

I don't remember how I got my first one, or what it was. Think it was a jungle one I got from rage killing the stupid hornets while I was trying to farm Chlorophyte.

I did recently have 3 Crimson key molds drop in a span of 10 minutes while I was farming Ichor though... (too bad I already had the Vamp Knives from a previous farming run). Also had a random Frozen and Hallowed key mold drop in that world too.

 

[CanSteam]

this was when 1.2 was first released

i was kind of looking for dark shards in the crimson and the game dropped a crimson key