It is attracted to the dropped item form of most full blocks. The cube can pick up a block, or a player can use a full block on the cube, causing the cube to absorb it into its body.
In this state, they become stuck in place and cannot be damaged by most sources. Instead, they are knocked back when attacked. They still take damage from environmental sources such as poisoning and burning for example.
The knockback also depends on the damage that would have been dealt, with stronger attacks sending the cube further.
Can be leashed in that state.
Blocks can be swapped by feeding it.
Shearing it removes and drops the block, reverting back to normal.
Depending on the block, they will behave differently when punched while in its immobile state, the following properties are:
Football/Regular: Medium speed, medium bounciness, medium ground friction and low air drag. (block example: stone)
Rubber ball/Bouncy: Fast speed, high bounciness, medium ground friction and low air drag. (block example: oak log)
Golf ball/Fast flat: Fast speed, low bounciness, medium ground friction and low air drag. (block example: moss block)
Sinks underwater.
Hockey puck/Fast sliding: Fast speed, no bounciness, low ground friction and low air drag. (block example: ice)
Sinks underwater.
High resistance: Very slow, low drag with low bounce with high friction. (block example: soul sand)
Sinks underwater.
Beach ball/Light: Slow speed, high bounciness, medium ground friction and high air drag. (block example: white wool)
Medicine ball/Slow flat: Slow speed, low bounciness, medium ground friction and medium air drag. (block example: block of iron)
Sinks underwater.
Curling stone/Slow sliding: Slow speed, no bounciness, low ground friction and low air drag. (block example: red mushroom block)
Sinks underwater.
Sticky: Medium speed and low air drag like a golf ball, but sticks with extremely high ground friction and no bounce to simulate stickiness, only affects the honeycomb block.
Sinks underwater.
Explosive: Medium speed, medium bounciness, medium ground and friction like a football, but with high air drag, only affects the TNT.
Can be ignited the same way as the TNT block and fireworks, in which it primed for 6 seconds until it explodes.
In that state, it cannot be sheared, picked up in a bucket, or damaged.
Sunny wearing a diamond helmet holding a bucket of sulfur cube in a sulfur cave mineshaft, while the small mangrove plank sulfur cube is looking at them