Peer Pressure {3}{U}
Sorcery
Choose a creature type. If you control more creatures of that type than each other player, you gain control of all creatures of that type. (This effect lasts indefinitely.)
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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.
Roar of the Crowd 99%
$0.17#19641
"Choose a creature type. this card deals damage to any target equal to the number of permanents you control of the chosen type."
Kindred Charge 99%
$9.20#5781
"Choose a creature type. For each creature you control of the chosen type, create a token that's a copy of that creature. Those tokens gain haste. Exile them at the beginning of the next end step."
Harmonized Crescendo 99%
$1.03#3553
"Choose a creature type. Draw a card for each permanent you control of that type."
Distant Melody 99%
$0.40#636
"Choose a creature type. Draw a card for each permanent you control of that type."
Kindred Summons 97%
$0.52#2399
"Choose a creature type. Reveal cards from the top of your library until you reveal X creature cards of the chosen type, where X is the number of creatures you control of that type. Put those cards onto the battlefield, then shuffle the rest of the revealed cards into your library."
For the Ancestors 96%
$3.50#7782
"Choose a creature type. Look at the top six cards of your library. You may reveal any number of cards of the chosen type from among them and put the revealed cards into your hand. Put the rest on the bottom of your library in a random order."
Kindred Dominance 94%
$3.18#716
"Choose a creature type. Destroy all creatures that aren't of the chosen type."
And They Shall Know No Fear 87%
$10.97#3555
"Choose a creature type. Creatures you control of the chosen type get +1/+0 and gain indestructible until end of turn."
Crippling Fear 87%
$2.86#1968
"Choose a creature type. Creatures that aren't of the chosen type get -3/-3 until end of turn."
Outbreak 87%
$0.18#29159
"Choose a creature type. All creatures of that type get -1/-1 until end of turn."
Caller of the Hunt 86%
$1.26#21197
"As an additional cost to cast this spell, choose a creature type."
Coordinated Barrage 85%
$0.14#18549
"Choose a creature type. this card deals damage to target attacking or blocking creature equal to the number of permanents you control of the chosen type."
Pack's Disdain 84%
$0.11#19617
"Choose a creature type. Target creature gets -1/-1 until end of turn for each permanent of the chosen type you control."
Tsabo's Decree 81%
$1.34#22966
"Choose a creature type. Target player reveals their hand and discards all creature cards of that type. Then destroy all creatures of that type that player controls. They can't be regenerated."