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.
It can also occur when a process that calls another process is itself called by that process, and there is no logic to detect this situation and stop the operation. A livelock differs from a deadlock, in that processing continues to take place, rather than just waiting in an idle loop. See deadly embrace.