Spined Tyrranax 

Creature — Dinosaur Beast
$0.23 #21793 0.06 1.9 years
At the beginning of combat on your turn, you may pay 
. When you do, put a +1/+1 counter on target creature. That creature gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)
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Cards similar to Spined Tyrranax 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.
Inti, Seneschal of the Sun80%
$1.27↑#1943↑0.18↑2.9 years
"Whenever you attack, you may discard a card. When you do, put a +1/+1 counter on target attacking creature. It gains trample until end of turn."
Skyrider Patrol80%
$0.13↓#236210.008.3 years↑
"At the beginning of combat on your turn, you may pay 
. When you do, put a +1/+1 counter on another target creature you control, and that creature gains flying until end of turn."
Kitt Kanto, Mayhem Diva80%
$0.26↑#11922↑0.074.5 years↑
"At the beginning of combat on each player's turn, you may tap two untapped creatures you control. When you do, target creature that player controls gets +2/+2 and gains trample until end of turn. Goad that creature."
Bearer of Memory78%
$0.08↓#26481↓0.004.7 years↑
"
: Put a +1/+1 counter on target enchantment creature. It gains trample until end of turn."
Tester of the Tangential77%
$0.20↓#199290.000.5 years↓
"At the beginning of combat on your turn, you may pay
. When you do, move X +1/+1 counters from this creature onto another target creature."
Ant-Man, Colony Commander76%
$0.19↓#16051↑0.36↑0.3 years↓
"Whenever this card attacks, you may pay
. When you do, put a +1/+1 counter on target creature."
Matt Murdock, Justice Seeker74%
$0.87↑#14339↑0.36↑0.3 years↓
"At the beginning of combat on your turn, you may pay
. When you do, put a +1/+1 counter on target creature you control."
Cytospawn Shambler74%
$0.20↓#246040.29↑20.5 years↑
"
: Target creature with a +1/+1 counter on it gains trample until end of turn."
Numa, Joraga Chieftain72%
$0.23#13466↑0.21↑5.9 years↑
"At the beginning of combat on your turn, you may pay 
. When you do, distribute X +1/+1 counters among any number of target Elves."
Okoye, Mighty and Adored72%
$0.33↑#16054↑0.26↑0.3 years↓
"At the beginning of combat on your turn, put a +1/+1 counter on target creature. Whenever that creature attacks the monarch this turn, it gains double strike and trample until end of turn."
Sample Collector72%
$0.05↓#29807↓0.002.7 years
"Whenever this creature attacks, you may collect evidence 3. When you do, put a +1/+1 counter on target creature you control."
Kirol, History Buff // Pack a Punch72%
$0.19↓#13942↑0.050.5 years↓
"Mill a card. Put two +1/+1 counters on target creature. It gains trample until end of turn."
Earthbender Ascension70%
$2.69↑#2138↑0.46↑0.9 years↓
"Whenever a land you control enters, put a quest counter on this enchantment. When you do, if it has four or more quest counters on it, put a +1/+1 counter on target creature you control. It gains trample until end of turn."
Wildheart Invoker70%
$0.04↓#14032↑0.0716.5 years↑
"
: Target creature gets +5/+5 and gains trample until end of turn."
Go-Shintai of Boundless Vigor70%
$0.23#5848↑0.064.7 years↑
"At the beginning of your end step, you may pay
. When you do, put a +1/+1 counter on target Shrine for each Shrine you control."