Flash allows it to appear at the perfect moment, and similar to Platinum Angel, its static ability locks the game in place until answered
Yes, Angel commanders are good in Commander when built with proper ramp and protection
In addition, one of my favorite (in-universe) legends is Tolsimir WolfbloodTolsimir Wolfblood, who I built as a tokens deck, which was published long ago
The cards in a compilation set are reprints of existing cards, making these releases similar to 'Greatest Hits' collections for the card game
These include cards such as Kozilek (card draw, counter), Deepfathom Skulker (card draw, unblockable), Sire of Stagnation (card draw), Oblivion Sower (land fetch), Desolation Twin (creature token), Drowner of Hope (creature tokens, tap), World Breaker (removal), Hideous Taskmaster (steal, annihilator), etc