Shelinda, Yevon Acolyte 

Legendary Creature — Human Cleric
Lifelink
Whenever another creature you control enters, put a +1/+1 counter on that creature if its power is less than Shelinda's power. Otherwise, put a +1/+1 counter on Shelinda.
click a line to search just that ability, click more to combine them
Cards that do something similar 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.
Good-Fortune Unicorn 92%
$0.34#3460
"Whenever another creature you control enters, put a +1/+1 counter on that creature."
Champion of Lambholt 91%
$4.25#551
"Whenever another creature you control enters, put a +1/+1 counter on this creature."
Skyknight Squire 91%
$0.33#5281
"Whenever another creature you control enters, put a +1/+1 counter on this creature."
Boss's Chauffeur 91%
$0.30#6255
"Whenever another creature you control enters, put a +1/+1 counter on this creature."
Celebrity Fencer 91%
$0.19#17903
"Whenever another creature you control enters, put a +1/+1 counter on this creature."
EPF Point Squad 91%
$0.12#22979
"Whenever another creature you control enters, put a +1/+1 counter on this creature."
Hulkling, Burgeoning Bruiser 90%
$0.21#24604
"Whenever another creature you control enters, if it has greater power or toughness than this card, put a +1/+1 counter on this card."
Marvel Boy, Noh-Varr 86%
$0.33#28765
"Whenever another creature you control enters and whenever you activate a power-up ability, put a +1/+1 counter on this card."
Bloodline Pretender 85%
$2.72#1811
"Whenever another creature you control of the chosen type enters, put a +1/+1 counter on this creature."
Attended Socialite 84%
$0.10#23413
"Whenever another creature you control enters, this creature gets +1/+1 until end of turn."
Kinsbaile Aspirant 84%
$0.11#19544
"Whenever another creature you control enters, this creature gets +1/+1 until end of turn."
Sanctifier of Souls 84%
$0.14#28193
"Whenever another creature you control enters, this creature gets +1/+1 until end of turn."
Griffin Protector 84%
$0.07#20904
"Whenever another creature you control enters, this creature gets +1/+1 until end of turn."
Loporrit Scout 84%
$0.16#19076
"Whenever another creature you control enters, this creature gets +1/+1 until end of turn."
Crossroads Watcher 84%
$0.13#19347
"Whenever another creature you control enters, this creature gets +1/+0 until end of turn."
Llanowar Stalker 84%
$0.09#22059
"Whenever another creature you control enters, this creature gets +1/+0 until end of turn."
Beast-Kin Ranger 84%
$0.14#15222
"Whenever another creature you control enters, this creature gets +1/+0 until end of turn."
East Wind Avatar 84%
$0.06#25277
"Whenever another creature you control enters, this creature gets +1/+0 until end of turn."
Mutant Town Musicians 84%
$0.09#26013
"Whenever another creature you control enters, this creature gets +1/+0 until end of turn."