A drawback is one of the many knobs Magic design can use to balance a card
More details on the PFM events and prizes can be found here
Pushing your deck above 60 (or 40) cards makes it harder to find key cards, increases the risk of "mana flood" (drawing only lands, so you have nothing to cast) and "mana screw" (drawing too few lands, so you can't cast any of the spells in your hand), and makes it more likely that you'll draw unplayable hands
You can target 1 Synchro Monster on the field
Battles of Legend: Chapter 1 (February 23rd, 2024) The Battles of Legend: Chapter 1 set reprints cards from Battles of Legend: Lights Revenge, Battles of Legend: Relentless Revenge, Battles of Legend: Heros Revenge, and Battles of Legend: Armageddon, as well as a select few cards from other sets too