You're going to need to buy at least 13 Happy Meals to get the whole set, and that's only if you've got the most fantastic luck, and only THEN if the packs include no repeats and 12.5 different combinations of cards
In the case of Poison Dart Frog, these numbers are 1/1, and they show Poison Dart Frogs power and toughness
This is far better in a pure ramp deck where you will much more reliably have spare lands and resources to throw away or perhaps more need of dealing with specific things
Remember that if you goad an enemy creature, it must attack players other than you if able, giving Shiny Impetus a bit of a political edge in Commander games
Anhelo's ability is only as useful as the expendable bodies you have on board
Given the generally low mana-curve in Modern, cards exiled with the pirate monkey will usually be castable with the help of the Treasures and almost any card is worth playing as it simply generates card advantage