#4 Counter Catcher Keeping in theme with cards that are widely used, Counter Catcher isnt nearly as powerful as Prime Catcher, but its still a strong item card that is especially powerful in decks that dont need to come out the gate firing (like Charizard ex)
Its not only a useful board wipe that you can build around, but also a good Creature anyway
The latter fit in well with the Pain ability and then I remembered that black liked to remove cards from graveyards so a few lines of text and a romp through Gatherer looking for wording precedents later I came up with what I think is a pretty awesome card with inherent synergy
Few graveyard commanders can return as many creatures from the graveyard at once as Nethroi
removing cards from the graveyard tends to correlate to grindy games that benefit from a creature you can chuck into play that slowly accrues advantage over a long game, especially if you throw in some cards that care about zombies or tokens
For all intents and purposes, drawing cards from an artifact's effect is the exact same as drawing cards from a green creature's effect, or a white enchantment's effect