Obuun, Mul Daya Ancestor 
Legendary Creature — Elf Spirit
$0.45 #10911 0.38 6.1 years
At the beginning of combat on your turn, up to one target land you control becomes an X/X Elemental creature with trample and haste until end of turn, where X is Obuun's power. It's still a land.
Landfall — Whenever a land you control enters, put a +1/+1 counter on target creature.
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Cards similar to Obuun, Mul Daya Ancestor 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.
Roaring Earth82%
$0.36↓#5394↑0.14↓4.7 years↓
"Whenever a land you control enters, put a +1/+1 counter on target creature or Vehicle you control."
+1 more matching line
Sazh's Chocobo79%
$0.51↑#2990↑0.441.4 years↓
"Whenever a land you control enters, put a +1/+1 counter on this creature."
Vinelasher Kudzu79%
$0.35↓#13535↓0.00↓21.0 years↑
"Whenever a land you control enters, put a +1/+1 counter on this creature."
Territorial Scythecat79%
$0.16↓#8109↑0.24↓6.1 years
"Whenever a land you control enters, put a +1/+1 counter on this creature."
Prowling Felidar79%
$0.17↓#14289↓0.20↓6.1 years
"Whenever a land you control enters, put a +1/+1 counter on this creature."
Ride the Shoopuf78%
$0.29↓#3528↑0.281.4 years↓
"Whenever a land you control enters, put a +1/+1 counter on target creature you control."
Beorn's Hospitality76%
$0.26↓#93490.350.2 years↓
"Whenever a land you control enters, put a +1/+1 counter on target creature you control."
+1 more matching line
Embodiment of Fury76%
$0.14↓#120810.07↓10.7 years↑
"Whenever a land you control enters, you may have target land you control become a 3/3 Elemental creature with haste until end of turn. It's still a land."
Ob Nixilis, the Fallen76%
$2.72↑#1945↑0.53↑17.0 years↑
"Whenever a land you control enters, you may have target player lose 3 life. If you do, put three +1/+1 counters on this card."
Bristly Bill, Spine Sower75%
$24.37↑#918↑1.00↑2.5 years↓
"Whenever a land you control enters, put a +1/+1 counter on target creature."
Murasa Ranger74%
$0.08↓#27217↓0.00↓11.0 years↑
"Whenever a land you control enters, you may pay 
. If you do, put two +1/+1 counters on this creature."
. If you do, put two +1/+1 counters on this creature."
Toph, Earthbending Master74%
$40.38↑#2999↑0.54↑0.9 years↓
"Whenever a land you control enters, you get an experience counter."
Wall of Resurgence74%
$0.10↓#21829↓0.00↓10.7 years↑
"When this creature enters, you may put three +1/+1 counters on target land you control. If you do, that land becomes a 0/0 Elemental creature with haste that's still a land."
Embodiment of Insight72%
$0.21↓#7200↑0.19↓10.7 years↑
"Whenever a land you control enters, you may have target land you control become a 3/3 Elemental creature with haste until end of turn. It's still a land."
Druid Class72%
$1.15↑#1663↑0.285.2 years
"When this Class becomes level 3, target land you control becomes a creature with haste and "This creature's power and toughness are each equal to the number of lands you control." It's still a land."
+1 more matching line
Waker of the Wilds72%
$0.21↓#16705↓0.00↓9.1 years↑
"
: Put X +1/+1 counters on target land you control. That land becomes a 0/0 Elemental creature with haste. It's still a land."
: Put X +1/+1 counters on target land you control. That land becomes a 0/0 Elemental creature with haste. It's still a land."
Undergrowth Champion72%
$0.38↓#8504↑0.00↓11.0 years↑
"Whenever a land you control enters, put a +1/+1 counter on this creature."
Thranduil's Company71%
$0.36↓#108080.280.2 years↓
"Whenever a land you control enters, put two +1/+1 counters on target creature you control. It gains vigilance until end of turn."
Retreat to Kazandu71%
$0.30↓#2606↑0.17↓11.1 years↑
"Whenever a land you control enters, choose one —"
Claim the Kingdom70%
$0.25↓#107420.310.3 years↓
"Whenever a land you control enters, put a +1/+1 counter on target creature you control and a plan counter on this enchantment."