Cards that are phased out are treated as if they do not exist, until the next turn when the card re-enters the battlefield
Its Bloodthirst ability lets it come in with +1/+1 counters based on damage dealt to your opponents, and its Enrage effect lets it deal damage to an opponent, each time it takes a hit, unless they sacrifice a (non-token) creature
It clears aside a problematic blocker and potentially enables a team-wide swing with protection
Reckless Rage is a four-of in the deck and isn't especially replaceable since it offers not only incredibly efficient removal, but another way to target your own creatures with a spell to grow heroic threats like Favored Hoplite and Tenth District Legionnaire
Might want to go get your tetanus shots updated sometime soon
Then that six-drop Naya colored 4/5 legendary is next with haste to swing now, first strike to punch first and then vigilance to keep stuff back