Other cards I looked at and word counted but didn't make the cut include All Hallow's Eve, Chains of Mephistopheles, Gargantuan Gorilla, Jeweled Amulet, Bronze Tablet, and Takkelmaggot
Toss in some buffs and you have a nasty Voltron commander on your hands
Wizards of the Coast (WotC) has released the full image gallery for Commander Masters , which includes all the alternate art variants
Black creatures also tend to offer some of the best ETB removal
Other synergy pieces Great Elves Arwen, Weaver of Hope buffs Elves on EtB with a number of +1/+1 counters equal to her toughness
If thats enough to convince you, how about the fact that the very word Phelddagrif is an anagram of Garfield, PhD., so they serve as an homage to the creator of Magic: the Gathering Richard Garfield