You can make a 4/4 Elemental creature token, you can pump your whole board by putting a +1/+1 counter on each creature you control, or you can scry 2 cards and then draw one
If you counter a problematic permanent before it enters the battlefield, it ends up in the graveyard same as if it had entered the battlefield and you removed it
The high MV is a problem, but with some support from cards like Repurposing Bay and Spire Golem this legendary artifact should be beefing up your creatures in no time
But realistically, Mardu Siegebreaker is a 4/4 deathtouch haste that gives a creature you control pseudo-myriad, and thats a lot of damage coming out of nowhere
5 Demonic Tutor Limited Edition Alpha - $934.99 Tutors are kind of like the bread and butter of black decks, letting you craft your hand depending on what you need or what the battlefield demands
This card is a delightful reference and exploration of that two-part experience