Nissa Vital Force specifically hurt Protector as she offers a recursion effect as well while being a much more reasonable return of power for the mana
For a 3/3 flier for 4 mana, that's a decent card that can turn all your spells into removal spells if you have a big enough dragon for it
Its active ability to sacrifice a Goblin for 1R and inflict two damage to a creature or player lets the player, should one prefer a passive style, quickly put the tokens put into play by other cards into the graveyard in order to reduce their life points over the opponents defense
Whenever an Egg you control dies, reveal cards from the top of your library until you reveal a creature card
You cant run one of these decks without powerhouses like them
Cards from SOI (or whatever the most recent set is) are usually great examples of how skewed the TCG high price can be, simply due to the drastic price decrease most cards experience over a short period of time