You +1 it to attach to your critter and then it now cannot be attacked to be killed, it gets a +1/+1 counter and then when the attached dork smashes face, you put that many loyalty counters here
Augur of Bolas, now a common, provides a great early blocker while likely replacing itself with a solid instant or sorcery, provided your deck is built appropriately
Harbinger of the Seas turns all nonbasic lands into Islands, so say goodbye to all your mana fixing, while Winter Moon doesnt let anyone untap their nonbasic lands
These cards will all have the same set symbol as Charizard, as the Legendary Collection was the first set to contain reverse holofoils and the last to include a reverse holofoil pattern like it
Outside of Mono White and Boros, however, I think the other colors have access to so many more reliable sources of card draw that I'd be more picky about recommending Mangara, though there are quite a few decks where it will shine
What's most interesting is how the story elements are already there
