Obuun, Mul Daya Ancestor 
Legendary Creature — Elf Spirit
$0.45 #10660 0.23 5.9 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%
$0.40↓#5240↑0.09↓4.5 years↓
"Whenever a land you control enters, put a +1/+1 counter on target creature or Vehicle you control."
+1 more matching line
Ride the Shoopuf78%
$0.32↓#3653↑0.201.2 years↓
"Whenever a land you control enters, put a +1/+1 counter on target creature you control."
Vinelasher Kudzu76%
$0.34↓#13232↓0.56↑20.9 years↑
"Whenever a land you control enters, put a +1/+1 counter on this creature."
Sazh's Chocobo76%
$1.12↑#3068↑0.37↑1.2 years↓
"Whenever a land you control enters, put a +1/+1 counter on this creature."
Prowling Felidar76%
$0.18↓#14068↓0.67↑5.9 years
"Whenever a land you control enters, put a +1/+1 counter on this creature."
Territorial Scythecat76%
$0.16↓#7958↑0.38↑5.9 years
"Whenever a land you control enters, put a +1/+1 counter on this creature."
Embodiment of Fury76%
$0.20↓#120290.50↑10.6 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."
Beorn's Hospitality75%
$0.25↓#13037↓0.00↓0.1 years↓
"Whenever a land you control enters, put a +1/+1 counter on target creature you control."
+1 more matching line
Bristly Bill, Spine Sower74%
$38.87↑#923↑0.96↑2.4 years↓
"Whenever a land you control enters, put a +1/+1 counter on target creature."
Toph, Earthbending Master74%
$36.28↑#3131↑0.00↓0.8 years↓
"Whenever a land you control enters, you get an experience counter."
Wall of Resurgence74%
$0.10↓#21840↓0.12↓10.6 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."
Ob Nixilis, the Fallen74%
$2.03↑#1963↑0.61↑16.9 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."
Embodiment of Insight72%
$0.24↓#7107↑0.1510.6 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."
Murasa Ranger72%
$0.07↓#26866↓0.40↑10.9 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."
Waker of the Wilds72%
$0.20↓#16314↓0.218.9 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."
Claim the Kingdom72%
$0.28↓#122990.00↓0.2 years↓
"Whenever a land you control enters, put a +1/+1 counter on target creature you control and a plan counter on this enchantment."
Druid Class72%
$2.29↑#1620↑0.195.1 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
Destiny Spinner71%
$1.06↑#980↑0.296.6 years
": Target land you control becomes an X/X Elemental creature with trample and haste until end of turn, where X is the number of enchantments you control. It's still a land."
: Target land you control becomes an X/X Elemental creature with trample and haste until end of turn, where X is the number of enchantments you control. It's still a land."
Retreat to Kazandu71%
$0.34↓#2539↑0.1611.0 years↑
"Whenever a land you control enters, choose one —"
Thranduil's Company70%
$0.44↓#13740↓0.00↓0.1 years↓
"Whenever a land you control enters, put two +1/+1 counters on target creature you control. It gains vigilance until end of turn."