You can Tribute Summon this card by Tributing 1 Dinosaur monster. During the Main Phase, if a Dinosaur monster is on the field, you can (Quick Effect): Immediately after this effect resolves, Tribute Summon this card from your hand. You can only use this effect of "Doodle Beast - Tyranno" once per turn. If this card is Normal Summoned: You can destroy 1 monster on the field, then, if this card was Tribute Summoned by Tributing a "Doodle Beast" monster(s), it gains ATK equal to half the destroyed monster's ATK on the field.