A card with a power level appropriate for Modern might not be fit for Standard
That wouldnt be enough to sell me on Tannuk, Memorial Ensign, but all you need to draw some free cards is some Lander tokens
But the problem with this line of thinking is that there was already an 8/8 artifact creature printed just one expansion before Tinker, which was another obvious target to be Tinkerd into play early
Kaito, Bane of Nightmares (Yes, we're aware this is a stretch on the definition we gave, but this clearly counts as a ninja)
When this leaves the battlefield, that card returns to the battlefield.) This creature can block any number of creatures
Mizzixs Mastery either gets a single spell cast from the graveyard or a whole pile of instants and sorceries in the graveyard