MACH-1, Swooping Scoundrel 
Legendary Artifact Creature — Human Villain
$0.26 #25846 0.27 0.3 years
Flying
When MACH-1 enters and whenever you gain life, surveil 1. This ability triggers only once each turn. (To surveil 1, look at the top card of your library. You may put it into your graveyard.)
Click a line or tag to filter
Cards similar to MACH-1, Swooping Scoundrel 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.
Vanguard Seraph97%
$0.17↓#10496↑0.10↓1.9 years↑
"Whenever you gain life for the first time each turn, surveil 1."
Starlit Soothsayer88%
$0.18↓#11356↑0.00↓2.2 years↑
"At the beginning of your end step, if you gained or lost life this turn, surveil 1."
+1 more matching line
Wary Farmer87%
$0.10↓#19470↑0.02↓0.7 years
"At the beginning of your end step, if another creature entered the battlefield under your control this turn, surveil 1."
Nightveil Sprite86%
$0.14↓#6901↑0.00↓8.0 years↑
"Whenever this creature attacks, surveil 1."
Il Mheg Pixie86%
$0.20↓#10983↑0.211.4 years↑
"Whenever this creature attacks, surveil 1."
Appendage Amalgam86%
$0.17↓#14094↑0.00↓2.1 years↑
"Whenever this creature attacks, surveil 1."
Fear of Surveillance86%
$0.24↓#12215↑0.00↓2.1 years↑
"Whenever this creature attacks, surveil 1."
Basilica Stalker86%
$0.11↓#221190.00↓2.7 years↑
"Whenever this creature deals combat damage to a player, you gain 1 life and surveil 1."
Sinister Starfish85%
$0.10↓#9225↑0.00↓5.3 years↑
"
: Surveil 1."
: Surveil 1."
Doom Whisperer84%
$6.17↑#1843↑0.278.0 years↑
"Pay 2 life: Surveil 2."
Wretched Doll84%
$0.14↓#213470.06↓1.7 years↑
", : Surveil 1."
, : Surveil 1."
Shore Lurker84%
$0.08↓#244280.07↓0.7 years
"When this creature enters, surveil 1."
+1 more matching line
Purple Pentapus84%
$0.13↓#15991↑0.03↓0.9 years
"When this creature enters, surveil 1."
Watcher in the Mist84%
$0.05↓#282870.00↓8.0 years↑
"When this creature enters, surveil 2."
Wreckage Wickerfolk84%
$0.16↓#14137↑0.00↓1.7 years↑
"When this creature enters, surveil 2."
Rune-Sealed Wall84%
$0.24↓#10579↑0.00↓1.9 years↑
": Surveil 1."
: Surveil 1."
Sultai Ascendancy83%
$0.33↑#9316↑0.00↓12.1 years↑
"At the beginning of your upkeep, surveil 2."
Think Tank83%
$0.23↓#208700.10↓25.1 years↑
"At the beginning of your upkeep, surveil 1."
Boulderborn Dragon83%
$0.16↓#12653↑0.251.5 years↑
"Whenever this creature attacks, surveil 1."
Whisper Agent82%
$0.09↓#242230.06↓8.0 years↑
"When this creature enters, surveil 1."