According to the EDHREC data, it is played in 4% of all decks, which is quite good, but since it has been printed in various Commander products, its hard to say how many of those hits are specifically from those listed in various places on the net
draw unlimited cards, and then box the other players out of the game
Pay close mind to what Teleportation Circle can flicker, and consider Dungeons, because theyre not only good value, but a number of rooms let you target Agrus to put +1/+1 counters on him (and vis-a-vis the team) with only the two mana to copy the ability
I'm not suggesting that you replace these cards with the cards in this list
It's just one more mana than Control Magic and cannot be answered with Naturalizes
This can be done a variety of different ways