CardName: Mirror Magic
Cost: 3uu
Type: Enchantment
Pow/Tgh: /
Rules Text: Whenever another player casts a spell, you may cast a spell
from your hand without paying its mana cost.
Flavour Text: The world exists to be used.
Set/Rarity: Mythics Mythic
Mirror Magic
M
Enchantment
Whenever another player casts a spell, you may cast a spell from your hand without paying its mana cost.
That might need to be a bit more CMC, but i'm no expert...
Also that flavor text lines up astonishingly with blue philosophy
thanks, i might put it up to 6 cmc