With that in the mix, Arena can be used to shut down most creature-based combo decks like Splinter Twin and Birthing Pod
(Equipment, Auras you control, and counters are modifications.) Whenever a modified creature you control deals combat damage to a player, search your library for a basic land card, put it onto the battlefield tapped, then shuffle
In decks like Mono-Blue Spirit in Pioneer/Explorer, it's a good way to deal out even more damage if you don't need to hold mana up anymore
1 Casey Jones, Vigilante Legendary Creature We've got Casey Jones, Vigilante down as the best red mana card in MTG TMNT so far, largely for how useful its card draw ability will be, in the right deck
It looks awesome, reads great, and plays brutally well - provided you can stick him onto the battlefield