Putting a creature into play with Quicksilver Amulet means you dont get any cast triggers they may have, and Eldrazi creatures come with some good ones
So much so, in fact, that its gotten a little tiring to see the latest doubler effect in new sets
Table of Contents show Why Go with a Dimir Commander
In addition to forcing each player to skip their discard phase, Anvil of Bagardan grants each player an additional draw at the beginning of their draw phase, but then they must choose and discard a card from their hand, offering those playing with graveyard shenanigans the free discard outlet they would have gotten at the end of the turn but now just at the beginning, meaning they could take advantage of it during their respective turns
Nazgul has an unusual effect, as it's one of the few MTG cards that lets you break deck building restrictions of whatever format you're playing in
Even without all of these block mechanics, filtering through your deck (card drawing) for free each turn is very powerful, but combined with the nature of the block, it put the Looter way over the top