Serrated Arrows [Duel Decks: Garruk vs. Liliana] XY201 The colossal Machina army is

The colossal Machina army is back with vengeance in Structure Deck: Mechanized Madness

Set: Torment Type: Instant Rarity: Rare Cost: {1}{U} Change the text of target spell or permanent by replacing all instances of one color word with another

also you cannot Special Summon monsters for the rest of this turn

Set: Black & White: Legendary Treasures Type: Item Rarity: Uncommon

Set: Commander 2014 Type: Instant Rarity: Rare Cost: {3}{R}{R} Split second (As long as this spell is on the stack

Serrated Arrows [Duel Decks: Garruk vs. Liliana] XY201 The colossal Machina army isSet: Duel Decks: Garruk vs. Liliana Type: Artifact Rarity: Common Cost: {4} Serrated Arrows enters the battlefield with three arrowhead counters on it. At the beginning of your upkeep, if there are no arrowhead counters on Serrated Arrows, sacrifice it. {T}, Remove an arrowhead counter from Serrated Arrows: Put a 1 1 counter on target creature.