Zirda, the Dawnwaker 
Legendary Creature — Elemental Fox
$1.50 #3349 0.37 6.5 years
Companion — Each permanent card in your starting deck has an activated ability. (If this card is your chosen companion, you may put it into your hand from outside the game for 
as a sorcery.)
as a sorcery.)Abilities you activate that aren't mana abilities cost 
less to activate. This effect can't reduce the mana in that cost to less than one mana.
less to activate. This effect can't reduce the mana in that cost to less than one mana., 
: Target creature can't block this turn.Click a line or tag to filter
Cards similar to Zirda, the Dawnwaker 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.
Biomancer's Familiar94%
$1.90↑#30610.387.7 years↑
"Activated abilities of creatures you control cost less to activate. This effect can't reduce the mana in that cost to less than one mana."
less to activate. This effect can't reduce the mana in that cost to less than one mana."
Training Grounds94%
$5.08↑#1040↑0.53↑16.5 years↑
"Activated abilities of creatures you control cost less to activate. This effect can't reduce the mana in that cost to less than one mana."
less to activate. This effect can't reduce the mana in that cost to less than one mana."
Heartstone94%
$1.89↑#38680.12↓28.6 years↑
"Activated abilities of creatures cost less to activate. This effect can't reduce the mana in that cost to less than one mana."
less to activate. This effect can't reduce the mana in that cost to less than one mana."
Forensic Gadgeteer84%
$2.04↑#1406↑0.25↓2.7 years↓
"Activated abilities of artifacts you control cost less to activate. This effect can't reduce the mana in that cost to less than one mana."
less to activate. This effect can't reduce the mana in that cost to less than one mana."
Jamuraan Lion83%
$0.19↓#28607↓0.05↓29.9 years↑
"
, : Target creature can't block this turn."
, : Target creature can't block this turn."
Spin Engine82%
$0.03↓#31581↓0.00↓15.7 years↑
"
: Target creature can't block this creature this turn."
: Target creature can't block this creature this turn."
Hall Monitor82%
$0.16↓#17627↓0.06↓5.5 years
", : Target creature can't block this turn."
, : Target creature can't block this turn."
Duct Crawler82%
$0.02↓#31242↓0.06↓28.6 years↑
": Target creature can't block this creature this turn."
: Target creature can't block this creature this turn."
Kozilek's Pathfinder80%
$0.09↓#20171↓0.55↑10.7 years↑
"
: Target creature can't block this creature this turn."
: Target creature can't block this creature this turn."
Professor Hojo80%
$0.24↓#5026↓0.12↓1.4 years↓
"The first activated ability you activate during your turn that targets a creature you control costs less to activate."
less to activate."
Convergence of Dominion80%
$0.92↓#12037↓0.12↓4.0 years↓
"As long as you control your commander, activated abilities of cards in your graveyard cost less to activate. This effect can't reduce the mana in that ability's activation cost to less than one mana."
less to activate. This effect can't reduce the mana in that ability's activation cost to less than one mana."
Mutagen Man, Living Ooze80%
$1.73↑#6041↓0.430.6 years↓
"Activated abilities of artifact tokens you control cost less to activate."
less to activate."
Sower of Chaos80%
$0.09↓#20261↓0.00↓1.9 years↓
": Target creature can't block this turn."
: Target creature can't block this turn."
Chainwhip Cyclops80%
$0.07↓#29505↓0.10↓7.5 years
": Target creature can't block this turn."
: Target creature can't block this turn."
Lambholt Harrier80%
$0.15↓#21367↓0.19↓5.1 years↓
": Target creature can't block this turn."
: Target creature can't block this turn."
Siegebreaker Giant80%
$0.09↓#27021↓0.07↓8.3 years↑
": Target creature can't block this turn."
: Target creature can't block this turn."
Goblin Rimerunner79%
$0.09↓#28782↓0.13↓20.2 years↑
": Target creature can't block this turn."
: Target creature can't block this turn."
Screeching Griffin78%
$0.09↓#32183↓0.00↓21.0 years↑
": Target creature can't block this creature this turn."
: Target creature can't block this creature this turn."
Sandstorm Verge78%
$0.29↓#6479↓0.06↓2.5 years↓
", : Target creature can't block this turn. Activate only as a sorcery."
, : Target creature can't block this turn. Activate only as a sorcery."
Power Artifact78%
$181.90↑#9827↓0.73↑32.6 years↑
"Enchanted artifact's activated abilities cost less to activate. This effect can't reduce the mana in that cost to less than one mana."
less to activate. This effect can't reduce the mana in that cost to less than one mana."