Hello! I'm Salas17, I got some ideas for new achievements for Minecraft, and, like I'm bored, I'll put some here, you can answer with more ideas, and I would like a lot If some mapmaker add one of my ideas on some of it maps. So, here I go:

Block Killer
Kill a Shulker.

Don't punch yourself
Use a Shiled to bounce an Arrow and strike the Skeleton that sent the Arrow.

IT'S ALIVE!!!
Spawn the Ender Dragon for 2nd time.

True Explorer
Find a Mansion.

Beautiful Eyes
Look at Enderman's Eyes.

Dog that barks does bite
Hit a wolf.

Masochistic
Hit yourself with an Arrow.

Like a bird
Use an Elytra.

I'm touching the sky
Use an Elytra with the rocket propulsion.

Almost the same
Have an Iron Nugget and a Gold Nugget in the inventory at the same time.

Undecided
Use all dyes with the same tunic.

Sheep Rainbow
Get a Sheep from each color.

8 legs, 4 eyes and 2 hearts
Kill a Spider with only 2 hearts.

Alcoholic
Drink every potion.

The Ultimate Trophy
Pick up the Ender Egg.

Invincible
Have all beacon effects at Level 2. (Except the Regeneration)

Recycling
Use a wooden tool as fuel in the furnace.

Waiting for Santa
Have 16 Cookies and a Milk Bucket in your inventory at the same time.

Where am I?
Drink an Invisibility potion.

Ok, that's all I created, maybe some are from another users that made it before than me, but I think all are mine, leave an answer with more achievements!

Salas17, out.