You can only activate 1 "Over Fusion" per turn
Following their dominance from the previous format, Tearlaments and Spright continues to ravage the OCG 2022.07 format with further support from Darkwing Blast
For example, this means that normally, if you control Hunting Velociraptor, you can cast Grim Giganotosaurus for its prowl cost only if a Dinosaur dealt combat damage to a player, but if an effect causes the spell to have other creature types, the prowl ability is also satisfied by a creature with those additional types having dealt combat damage to a player
While noticeable exceptions do exist, such as the phenomenally rare and valuable Umbreon Star POP Series 5, among the ungraded Umbreon cards currently moving on the secondary card market, this one is king
Free things are great, sure, but this mechanic also instills a weird sort of fear of missing out that makes you feel like you're almost losing money by not logging in for a single day