Altars effect isnt just great for getting consistent access to your other assassin creatures: This Mardu commander is perfect for running a gimmicky type-changer deck where you can exploit any creatures you like with cards like Conspiracy and Ashes of the Fallen
The two best cards from Homelands are spells anyhow (Merchant Scroll and Memory Lapse), further adding insult to injury
Spelljack + Desertion Spelljack and Desertion are almost identical cards, with the slight difference that the latter is easier to cast, at the expense of only being able to cast free creatures and artifacts, while the former can hit anything unconditionally
Hellkyte Tyrant : Trample makes it deal damage to a player much more easily, and if you steal a bunch of artifacts, you can use them to boost Hellkite Igniter
For three mana, while this Human's toughness is statically four, its power is equal to the number of creatures under its owner's control