Chief Engineer [Commander 2016] SM52 You may cast any number

You may cast any number of spells with mana value X or less from among them without paying their mana costs

Take control of all face-up Level 3 or lower monsters on your opponent's side of the field until they are removed from the field

Set: Champion Pack 2 Card type: Normal Spell Rarity: Common Attack: 0 Defense: 0 Add 1 Field Spell Card from your Deck to your hand

or attack while this card is in face-up Attack Position on the field

"Dear Magic R&D

Chief Engineer [Commander 2016] SM52 You may cast any numberSet: Commander 2016 Type: Creature Vedalken Artificer Rarity: Rare Cost: {1}{U} Artifact spells you cast have convoke. (Your creatures can help cast those spells. Each creature you tap while casting an artifact spell pays for {1} or one mana of that creature's color.) An eye for detail, a mind for numbers, a soul of clockwork.