Chord of Calling [Magic 2015] Commander 2015 where X is the number

where X is the number of attacking creatures

Tezzeret Type: Artifact Creature — Frog Rarity: Common Cost: {4} Affinity for artifacts (This spell costs {1} less to cast for each artifact you control

Set: Modern Masters Type: Creature — Elemental Rarity: Rare Cost: {4}{W} Flying

Set: Worldwake Type: Legendary Creature — Ogre Warrior Rarity: Rare Cost: {3}{R}{R} Whenever a creature an opponent controls attacks

Hospitality is of little concern to those who do not wish to be disturbed

Chord of Calling [Magic 2015] Commander 2015 where X is the numberSet: Magic 2015 Type: Instant Rarity: Rare Cost: {X}{G}{G}{G} Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle.