Mana Short 
Instant
$0.39 #15492 1.02 33.1 years
Tap all lands target player controls and that player loses all unspent mana.
Click a line or tag to filter
Cards similar to Mana Short 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.
Power Sink84%
$0.14↓#9857↑0.81↓33.1 years
"Counter target spell unless its controller pays 
. If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana."
. If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana."
Gulf Squid78%
$0.15↓#27248↓0.46↓26.3 years↓
"When this creature enters, tap all lands target player controls."
Early Frost76%
$0.12↓#25246↓0.82↓22.3 years↓
"Tap up to three target lands."
Drain Power76%
$3.17↑#164980.80↓33.1 years
"Target player activates a mana ability of each land they control. Then that player loses all unspent mana and you add the mana lost this way."