This is Minecraft Mod. It can show "Immortal Object" Tip. Just like Sword Art Online.
When player left click on bedrock...
0.2.15
Upgrade to 1.10.2 (Forge 12.18.3.2185)
0.1.9
Show tip When player attacked in creative mode.
0.1.4
Tip become translucent.
SAO UI Regular：http://darkblackswords.deviantart.com/art/Sword-Art-Online-Font-342305125