The card back designs were in the Expedition, Aquapolis, and Skyridge expansion sets
If Frodo Baggins is your Ring-bearer, only one creature is required to block it
The novel idea Brian and his team (Aaron Forsythe, Mark Gottlieb, Matt Place, Paul Sottosanti, and Henry Stern) had was to use self-milling as an additional cost
The effect isn't quite as interesting, but it's hilarious to note that the chicken is 3/3, which is stronger than some knights in armour in M:TG land, and it has the potential to grow even stronger when you roll a die
If it's a Pendulum Summoning deck, there won't be many monsters in the Graveyard, so it's easy to Special Summon even in the middle of a duel
If this card is destroyed then you can special summon 2 Phantom Knights monsters from your graveyard with the same level, then increase their levels by 1