Serene Master 
Creature — Human Monk
$0.68 #18990 0.50 12.8 years
Whenever this creature blocks, exchange its power and the power of target creature it's blocking until end of combat.
Click a line or tag to filter
Cards similar to Serene Master 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.
Shape Stealer94%
$0.35↓#25663↓0.31↓21.3 years↑
"Whenever this creature blocks or becomes blocked by a creature, change this creature's base power and toughness to that creature's power and toughness until end of turn."
Riptide Mangler84%
$0.39↓#28481↓0.29↓23.6 years↑
"
: Change this creature's base power to target creature's power."
: Change this creature's base power to target creature's power."
Sentinel81%
$0.41↓#24631↓0.17↓32.3 years↑
"
: Change this creature's base toughness to 1 plus the power of target creature blocking or blocked by this creature."
: Change this creature's base toughness to 1 plus the power of target creature blocking or blocked by this creature."
Sworn Defender78%
$0.91↑#28815↓0.5030.2 years↑
": This creature's power becomes the toughness of target creature blocking or being blocked by this creature minus 1 until end of turn, and its toughness becomes 1 plus the power of that creature until end of turn."
: This creature's power becomes the toughness of target creature blocking or being blocked by this creature minus 1 until end of turn, and its toughness becomes 1 plus the power of that creature until end of turn."
Engulfing Slagwurm72%
$0.54↓#10179↑0.00↓15.9 years↑
"Whenever this creature blocks or becomes blocked by a creature, destroy that creature. You gain life equal to that creature's toughness."
Halfdane71%
$35.20↑#28300↓0.6032.3 years↑
"At the beginning of your upkeep, change this card's base power and toughness to the power and toughness of target creature other than this card until the end of your next upkeep."
Meglonoth71%
$0.36↓#220300.38↓17.6 years↑
"Whenever this creature blocks a creature, this creature deals damage to that creature's controller equal to this creature's power."