Battles of Legend: Crystal Revenge

If you control no monsters, or if all monsters you control are Dinosaur monsters: You can Special Summon this card from your hand. If this card is Normal or Special Summoned: You can add 1 "Doodlebook" Spell/Trap from your Deck to your hand, then discard 1 card. You can only use each effect of "Doodle Beast - Stego" once per turn.

Doodle Beast - Stego

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.