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The Warden will be the first blind mob to be added to Minecraft. Instead of following the player normally, it uses the sculk-like sensors on its head to detect vibrations.
A good defense to use in order to avoid fighting the Warden is to sneak or throw projectiles such as snowballs or arrows to distract it, which was shown during the Minecraft Live 2020 event. It was shown in the reveal that the Warden will be attracted to projectiles that produce a sound. However, fighting the Warden is not recommended, as it does a lot of damage. Mojang developers also stated that this mob is not meant to be fought, but rather is meant to scare players.
The Warden seems like it gets faster when attacked, and it deals so much damage that it can kill a player wearing full netherite armor in two hits (any weaker armor or no armor will result in the player being killed in 1 hit).
The Warden won't hear the player if the they sneak past it, but if the player attacks it enough, it will lock onto them and won't get distracted by other noises. At this point, it will begin charging at the player significantly faster than before.
Its heartbeat is audible as well as visible, and the more it is attacked, the stronger it gets, and the stronger it gets, the more its soul-filled heart flashes.
Wardens are found deep underground in deep dark caves located at "the deepest depths of the world" where sculk is found. The area around it is very dark so it is easier for the Warden to sneak up on the player. Though the depths of the deep dark caves are unknown, it's confirmed to be the at the lowest point of the Minecraft overworld, just above bedrock.
- It is recommended to throw snowballs or shoot arrows away from the Warden and the player to distract it while the player is being chased, so the player can sneak away from it and get out alive.
- It will be the first blind mob to be added to Minecraft.
- If the Warden is near, all nearby light sources will start to flicker. This is caused by the Warden's presence.
- Like the iron golem, it is capable of dealing a hefty amount of damage within a single blow, however, unlike the iron golem, the range in which it can hit something is pretty small.
- In the reveal trailer there was a structure with cobwebs, candles, chests, and what appears to be deepslate. That area could be the Deep Dark, where this new mob is found.
- The Warden may very well be the strongest mob in Minecraft, considering that it takes two blows to kill a player in full netherite armor (exactly 10/7 blows), in terms of attack strength as shown in Minecraft Live 2020.
- In a tweet by Kingbdogz, it was confirmed that the Warden is a bit taller than an iron golem at four blocks compared to the iron golem's three. 
- In another tweet by Kingbdogz, it was also shown that the Warden is approximately twice as tall as the player. 
- In another tweet by Kingbdogz, it was confirmed that the Warden, does give off some kind of heartbeat sound. 
- In another tweet by Kingbdogz, it was confirmed that the Warden is made up of sculk, just like the blocks around the warden.
- In another tweet by Kingbdogz, it was confirmed that the Warden will attack every mob, if it gives off a sound or vibration (The only mob that isn't attacked by a Warden is another Warden). 
- In an interview with several YouTubers, a developer stated that their wish for the Warden would be more like a natural disaster than a boss mob. "When you see a tornado, you run away, not run up to it and swing a sword at it..." This is also the reason why the warden will have no drops of value.
- The Warden has similarities with many monsters from the video game franchises made by Frictional Games, another Swedish video game company. It shares resemblance to monsters like Proxy from SOMA in a sense of being blind and having to be avoided stealthily. Its color palette resembles mutations caused by WAU, which makes things dark black with blue electrical dots. Torches flickering in the warden's presence are also similar to the enemy mechanics in Amnesia: A Machine for Pigs, in which there are flickering torches when the enemy is nearby.
- Another possibility is that the Warden was inspired by Jeff from Half-Life: Alyx. They share many similarities, such as being an undefeatable monster that lurks within a certain environment, is blind but senses sounds, and made of a slime-like substance.
- It also shares some traits with the aliens from A Quiet Place as both are blind, hunt by sound, extremely strong, and near indestructible.
- Kingbdogz has confirmed that the Warden has a larger radius for hearing vibrations than the sculk sensor.
- He also confirmed in another tweet that the Warden and the skulk sensor act the exact same (other than their radius).
- The name matches a name of a Minecraft: Story Mode character: the warden, which appeared in season 2 episode, although this may be entirely coincidental.