Helm of Chatzuk [Collectors' Edition] BW14 If it's an attack action

If it's an attack action card

Set: Secret Lair: Ultimate Edition 2 Type: Land // Land Rarity: Rare Exile Simian Spirit Guide from your hand: Add {R}

You have no maximum hand size for the rest of the game

Set: Expedition: Base Set Type: Fighting Rarity: Uncommon Retreat cost: Colorless

they can't prevent arcane damage from sources you control this turn

Helm of Chatzuk [Collectors' Edition] BW14 If it's an attack actionSet: Collectors' Edition Type: Artifact Rarity: Rare Cost: {1} {1}, {T}: Target creature gains banding until end of turn. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding a player controls are blocking or being blocked by a creature, that player divides that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)