Titan of Littjara is a card that any typal deck might want, as it becomes any creature type when it enters the battlefield and can then draw a card for each card of the chosen creature type you control when it attacks or when it entered the battlefield
The rest of your deck is not so resilient to a board wipe - and a board wipe can seriously set you back, though you can usually hold up a counterspell or two to protect your ninja army
If, upon resolving, the target is illegal, the ability is countered, i.e
1 Rise from the Grave
Ulamog, the Ceaseless Hunger There are a few powerful monsters lurking in Historic, waiting to get the play they deserve
I stumble too much with self-mill and end up hitting my good stuff, so if you're like me, spring for the good reanimation spells and go to town