Awaken the Sky Tyrant [Commander 2015] SM225 Those creatures have "This creature's

Those creatures have "This creature's power and toughness are each equal to the number of creature cards in its controller's graveyard

Ragavan enters the battlefield tapped and attacking

Set: Revised Edition Type: Artifact Rarity: Uncommon Cost: {1} As The Rack enters the battlefield

Your opponent cannot activate cards or effects in response to this card's activation

and Frightfur Fusion

Awaken the Sky Tyrant [Commander 2015] SM225 Those creatures have "This creature'sSet: Commander 2015 Type: Enchantment Rarity: Rare Cost: {3}{R} When a source an opponent controls deals damage to you, sacrifice Awaken the Sky Tyrant. If you do, create a 5 5 red Dragon creature token with flying.