Shatter Mod

Shatter is a mod for Minecraft which has a creative Death Animation when you kill a mob you get a slow animation of the mob fading out and floating and their body parts separating. The effects are quite different on each mob. The Blaze seems to have very good animation, but others such as the Zombie horse also have good animation. The mod is client-side only which means that you can play with it on a server without the mod installed and still get the effects (In fact it warns you if you try to run it on a server.). The mod is also compatible with OptiFine, putting it ahead of many other rendering mods which do not work with Optifine. The mod still works even if a mob is killed by another mob, the animation will still show up. The drops show up as normal and the mob just fades away and does not affect the game in any way that could make it incompatible with servers the mod also works on players meaning you can see your enemies fade away after they die while playing on a server (though the other players will not have the same animation and it is cosmetic only). This mod is for MC Forge 1.16.5 and requires iChunUtil (Don’t let that scare you away though, lots of other great mods use it).

 The animations do seem to have some drawbacks though, the animations are a little basic, sometimes the fading mob will just get pushed back and fade away with little moving of their body parts, and in general, the animation does not do much unless you like the animation a lot. The animation works on some modded mobs, but not all, such as it did not work on Chaos Awakens or Lycanites, and the mobs from these mods just instantly disappeared with not even the original vanilla death animation. It is likely mods need to manually integrate themselves with this mod. In the vanilla game, not all mobs seem to be fully affected by the animation (and just use the normal death animation), and baby mobs and bosses require you to enable the animations for them in the config, or else they also use the normal death animation. The death animation can also be a bit of a distraction in some cases. 

But if you like the death animation and want to play on 1.16.5 Forge it may be a good choice, especially if you have a ghost server. They also have 1.16.1, 1.15.2, 1.12.2, 1.10.2, 1.8, 1.7.x, and 1.6.4 versions if you want to play on older versions. This is a very good lightweight vanilla+ mod. The animations are quite similar to those in the Morph mod and the 2 mods are made by the same person, and Shatter has integration with the Morph Mod. If you get this mod you would probably also want to check out a few of ohaiiChun’s other mods, as they have lots of other good vanilla plus mods to enhance your game.