Fires of Invention 
Enchantment
$0.26 #14793 0.31 7.0 years
You can cast spells only during your turn and you can cast no more than two spells each turn.
You may cast spells with mana value less than or equal to the number of lands you control without paying their mana costs.
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Omniscience82%
$5.87↑#1028↑1.60↑14.3 years↑
"You may cast spells from your hand without paying their mana costs."
Omnipresence78%
$2.35↑#18139↓0.56↑0.0 years↓
"You may cast spells with mana value less than or equal to the number of creatures you control from your hand without paying their mana costs."
Sram's Expertise76%
$0.61↑#6911↑0.17↓9.7 years↑
"You may cast a spell with mana value 3 or less from your hand without paying its mana cost."
Yahenni's Expertise74%
$0.38↑#8753↑0.259.7 years↑
"You may cast a spell with mana value 3 or less from your hand without paying its mana cost."
Rishkar's Expertise74%
$1.79↑#242↑0.54↑9.7 years↑
"You may cast a spell with mana value 5 or less from your hand without paying its mana cost."
Baral's Expertise73%
$0.24↓#3852↑0.21↓9.7 years↑
"You may cast a spell with mana value 4 or less from your hand without paying its mana cost."
Cramped Vents // Access Maze72%
$0.30↑#7773↑0.222.1 years↓
"Once during each of your turns, you may cast a spell from your hand by paying life equal to its mana value rather than paying its mana cost."
Solstice Revelations70%
$0.26#6988↑0.270.9 years↓
"Exile cards from the top of your library until you exile a nonland card. You may cast that card without paying its mana cost if the spell's mana value is less than the number of Mountains you control. If you don't cast that card this way, put it into your hand."
Kari Zev's Expertise70%
$1.48↑#6961↑0.279.7 years↑
"You may cast a spell with mana value 2 or less from your hand without paying its mana cost."