But at that point, you should stop and consider if you really need to add more Ink each turn
If you have ten creatures, all your creatures get +10/+10, which in most cases will outclass practically everything your opponents play
If the target creature is an illegal target when Fell the Mighty tries to resolve, Fell the Mighty won't resolve and none of its effects will happen
Double Masters is unique since every pack offers two rares (potentially upgraded to mythics) and two foils, along with eight commons and three uncommons as well asassuming you buy a sealed boxtwo non-foil box toppers
Torrential Gearhulk represents the exaggerated claims that control decks in Kaladesh were dead
Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for convoke