Mischief and Mayhem 

Sorcery
$0.07 #30094 0.12 12.7 years
Up to two target creatures each get +4/+4 until end of turn.
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Cards similar to Mischief and Mayhem expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Wielding the Green Dragon90%
$5.38↑#293260.2027.5 years↑
"Target creature gets +4/+4 until end of turn."
Nahiri's Stoneblades86%
$0.08↑#253960.00↓7.5 years↓
"Up to two target creatures each get +2/+0 until end of turn."
Hearts on Fire84%
$0.24↑#23373↑0.00↓1.9 years↓
"One or two target creatures each get +2/+1 until end of turn."
Arm the Cathars84%
$0.05↓#22084↑0.064.9 years↓
"Until end of turn, target creature gets +3/+3, up to one other target creature gets +2/+2, and up to one other target creature gets +1/+1. Those creatures gain vigilance until end of turn."
Primal Might84%
$0.10↑#3863↑0.036.3 years↓
"Target creature you control gets +X/+X until end of turn. Then it fights up to one target creature you don't control."
Dauntless Onslaught82%
$0.06↓#261050.1713.1 years
"Up to two target creatures each get +2/+2 until end of turn."
Sigil Blessing82%
$0.07#242040.0518.0 years↑
"Until end of turn, target creature you control gets +3/+3 and other creatures you control get +1/+1."
Larger Than Life82%
$0.15↑#17797↑0.0610.1 years↓
"Target creature gets +4/+4 and gains trample until end of turn."
Confidence from Strength82%
$0.14↑#275170.058.3 years↓
"Target creature gets +4/+4 and gains trample until end of turn."