it costs nothing to use, and it can also be used as an interrupt
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It only triggers once each turn, and a 1/1 creature is easily killed by almost anything above a stiff breeze
The Vow megacycle is a more obvious if expensive example: theyre straight-up buffs for your creatures, goad effects in multiplayer, or Guard Duty in a 1v1 situation
The other possibility is playing Invasion of Regatha in a dedicated burn deck since the backside seems pretty powerful with Play with Fire, Lightning Strike, and friends as a weird twist on Torbran, Thane of Red Fell, although I'm not sure a burn deck wants to use multiple burn spells or attacks to remove the five defense counters to defeat the battle