Ideally you'd be putting this on something withy lifelink to keep the gains going, or even Qala, Ajani's Pridemate to increase the buff when it swings with other creatures
For instance, despite all five Titans being legal, Elesh Norn was a dominant Standard card on multiple occasions, most memorably in its role of what you can Birthing Pod a Titan or Wurmcoil Engine into. Creatures (28) 1 Llanowar Elves 1 Solemn Simulacrum 4 Birds of Paradise 1 Acidic Slime 1 Inferno Titan 1 Wurmcoil Engine 1 Viridian Emissary 1 Elesh Norn, Grand Cenobite 4 Blade Splicer 1 Fiend Hunter 3 Avacyn's Pilgrim 1 Geist-Honored Monk 4 Strangleroot Geist 4 Huntmaster of the Fells Lands (24) Spells (8) In a format full of haymakers, Elesh Norn was one for the ages, particularly alongside lots of small, dorky creatures like Llanowar Elves and Germ tokens
but it can functionally "Negate" a Banefire, despite that card being un-counter-able
Whenever you cast a red spell, Aragorn, the Uniter deals 3 damage to target opponent
Its effective as a defense against wide decks, which is important in Commander
Whenever Wintermoor Commander attacks, another target Knight you control gains indestructible until end of turn