You need to fill your graveyard with creatures to set up its enters ability
I quite like using bounce lands to recharge vivids and gain extra life with gain lands
Not surprisingly, it also works pretty well with Teferi, Master of Time, allowing every +1 to be a draw two, discard one
III - Until end of turn, another target creature you control gains trample and gets +X/+X, where X is the number of lands you control
The "star" pattern is copied directly from the original card image that they photographed and then they printed that star pattern directly onto the card
Suspicious Stowaway is one of the better tools for blue aggressive decks, plays great in midrange shells, and will do what you want it to do in Reanimator decks and other strategies that care about filling the graveyard