The flip side, Harnfel, Horn of Bounty, is also a good source of extra cards, giving you two good options of how to cast this
If a creature can't attack or block unless you return a permanent to your hand, and your hand is empty, you can attack or block with that creature and Lupine Prototype
However, if a single creature you control with lifelink deals combat damage to multiple creatures, players, and/or planeswalkers at the same time (perhaps because it has trample or was blocked by more than one creature), the ability will apply only once
Protecting your permanents will come pretty easy with white and green
Check for printing errors on the card back As the one part of a Pokmon card's design that almost never changes, you might think that the iconic 'Pokball on blue swirl' card back design would be the easiest thing to fake correctly, but in fact it's specifically designed to be difficult to reproduce just right, and consequently is an important red flag for fakes that you should always check