Drafting a mono-black deck in triple Urzas Saga Draft was one of the most overpowered Draft archetypes in Magics history
Finally, and most likely, obviously a 600 atk monster is vulnerable to other monsters, it has no flesh, and especially since your opponent can just plop their monster (700 atk or more) in a DIFFERENT zone on their turn and blow it up
(Some Dragontails do more than that, like also destroying or negating your opponent's cards, too!) Every Dragontail monster also has an additional special ability, like returning itself to your Deck after use, or allowing you to Fusion Summon during your opponent's turn
4 Pecharunt ex Pecharunt ex packs both a strong attack and a seriously useful ability, making it a must-have in any deck
At the beginning of combat on your turn, each player rolls a d20