It was also popular in the Shards of Alara block to see green, white, and blue Angels from the Shard of Bant. Also, in the Alara Reborn set, Filigree Angel was a white and blue artifact creature. The most known Angel in Magic is Akroma, Angel of Wrath. Released in the Onslaught expansion, Akroma was created by master illusionist Ixidor to fight Phage the Untouchable and the Cabal.
Deadlocks are sometimes called a deadly embrace. Deadlock is a condition that can occur on any system with multiple threads, not just on a relational database management system, and can occur for resources other than locks on database objects. For example, a thread in a multithreaded operating system might acquire one or more resources, such as blocks of memory.
A deadlock is a condition where a process cannot proceed be cause it needs to obtain a resource held by another process and it itself is holding a resource that the other process needs. We can consider two types of deadlock: communication deadlock occurs when process A is trying to send a message to process B, which is trying to send a message to process C which is trying to send a message to A. A resource deadlock occurs when processes are trying to get exclusive access to devices, files, locks, servers, or other resources.