Xolatoyac, the Smiling Flood 


Legendary Creature — Salamander Serpent
Whenever Xolatoyac enters or attacks, put a flood counter on target land. That land is an Island in addition to its other types for as long as it has a flood counter on it.
At the beginning of your end step, untap each permanent you control with a counter on it.
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.
Eluge, the Shoreless Sea 100%
$4.96#2953
"Whenever this card enters or attacks, put a flood counter on target land. It's an Island in addition to its other types for as long as it has a flood counter on it."
Unstoppable Plan 89%
$2.58#1921
"At the beginning of your end step, untap all nonland permanents you control."
The Thirteenth Doctor 88%
#4956
"At the beginning of your end step, untap each creature you control with a counter on it."
Veteran Beastrider 82%
$0.29#9757
"At the beginning of your end step, untap each creature you control."
Seedborn Muse 81%
$15.21#281
"Untap all permanents you control during each other player's untap step."