These orange and yellow blocks is the Suspicious Block. You can't craft or smelt anything to get the block. It spawns natural. You can find it around stones.
There is no specific tool to break it. When you break it, random things will happen.
These are what will happen:
Set player's food level to 1
Give player two diamonds
Remove three blocks under Suspicious Block
Kill player
Give player regeneration effect for 100 ticks
Give player speed effect for 100 ticks
Give player weakness effect for 100 ticks
Give player eight netherite ingots
Remove 900 XP from player
Give player ten gold ingots
More Images
Future Updates
Add more things happen when player breaks a suspicious block