Any time that I talk about ETBs and copying abilities, it almost feels obligatory to mention Dockside Extortionist but there are plenty of other great choices too
Dealing damage with The Eleventh Doctor lets you exile a card from your hand, putting time counters on it equal to its mana value, and giving it suspend
If you print and find the fit of the phone arm to body of the slinger is loose, increase the scale of the arm by 1 or 2 % and print again, i did my best to provide tolerances that would suit entry level printers at .4mm tolerances I have printed with 3 perimeter walls, 4 top and bottom, and at 7.5% infill and it is quite robust User Tips and App Mana box is easily the best app for this , hands down and recognizes MOST cards, and has quick features to set a card as foil, or change set etc Here is a quick video of my settings and use of ManaBox - I use the prefer foil checkbox to scan foil items in bulk separately from std
At infinite life and gain 2 life
When you throw in the immunity to Commander tax, the potential for library manipulation, the each opponent wording on the trigger, and the massive scaling when played with other Ninjas, you get the most fearsome tempo creature this side of Ragavan