With more people playing the game than ever before, the options for how you can play are nearly infinite
Stormbreath would be a much better card if you traded the monstrous and the pro white for a mere +1/+1 but it still wouldn't be quite the Thundermaw
for example, if you have Pokmon that use Fighting Energy, make sure you have Fighting Energy cards in your deck
Once you dilute that ratio, you might find yourself stuck without the mana you need or with the wrong half of your deck in your opening hand
1 [TS-01] 9 May Anime 25th Collection [EB-02] 6 June A Fist of Divine Speed [OP-11], Red Shanks Starter Deck [ST-23], Green Jewelry Bonney Starter Deck [ST-24], Blue Buggy Starter Deck [ST-25], Purple/Black Monkey D
Two mana to reanimate and end up with two beefy lifelink creatures is absurdly good, which makes this an easy call as a strictly better Phyrexian Delver