Knighted Myr {2}{W}
Artifact Creature — Myr Knight
{2}{W}: Adapt 1. (If this creature has no +1/+1 counters on it, put a +1/+1 counter on it.)
Whenever one or more +1/+1 counters are put on this creature, it gains double strike until end of turn.
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.
Chandra's Pyreling 82%
$0.25#12006
"Whenever a source you control deals noncombat damage to an opponent, this creature gets +1/+0 and gains double strike until end of turn."