In short, youll have plenty of ways to get that engine into play
Once, while this card is in your Pendulum Zone: You can target 1 card in a Pendulum Zone
Thragtusk is good because it is immense value, the immediate life hit and then the 3/3 guy when Tusk goes away
Zada, Hedron Grinder Zada, Hedron Grinder is a very, very specific spellslinger commander but that specificity makes them unique
A Stifle attached to a 3/2 is a decent disruptive card, but the Tidebinder shutting down problematic creatures like Orcish Bowmasters and artifacts like The One Ring has proven to be incredible
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