It lights up the sky, beckoning enemies only to repel them.

The Brothers' War Retro Artifacts

Defense Grid

Each spell costs {3} more to cast except during its controller's turn.

"Properly installed, each powerstone emits a targeted electromagnetic field that halts momentum as sure as stone."
—*Tome of Obstructions*

"Woven together, strands of aether can form a mesh of surprising stability, though such a network tends to pull power from nearby devices."
—Consulate engineer's log

Kaladesh Inventions

Ninth Edition

During each player's turn, each other player's spells cost {3} more to play.

"A good deal of tyranny goes by the name of protection."
—Crystal Eastman, "Equality or Protection"

Eighth Edition

"We've managed to keep the goblins in their assigned areas, but there's little we can do about the smell."
—Whip Tongue, viashino technician

World Championship Decks 2000

Urza's Legacy

During each player's turn, spells played by another player cost an additional o3.