The List

Guerrilla Tactics

Guerrilla Tactics deals 2 damage to any target.
When a spell or ability an opponent controls causes you to discard Guerrilla Tactics, Guerrilla Tactics deals 4 damage to any target.

Tenth Edition

Guerrilla Tactics deals 2 damage to target creature or player.
When a spell or ability an opponent controls causes you to discard Guerrilla Tactics, Guerrilla Tactics deals 4 damage to target creature or player.

Ninth Edition

Eighth Edition

Guerrilla Tactics deals 2 damage to target creature or player.
When a spell or ability an opponent controls causes you to discard Guerrilla Tactics from your hand, Guerrilla Tactics deals 4 damage to target creature or player.

Deckmasters

Alliances

Guerrilla Tactics deals 2 damage to target creature or player.
If a spell or effect controlled by an opponent causes you to discard Guerrilla Tactics from your hand, reveal Guerrilla Tactics to all players, and it deals 4 damage to target creature or player.