Any nonbasic land they play will come into play tapped, preventing them from using it

The Transformers cards available in The Brothers War products are: Prowl, Stoic Strategist / Prowl, Pursuit Vehicle Ratchet, Field Medic / Ratchet, Rescue Racer Jetfire, Ingenious Scientist / Jetfire, Air Guardian Blitzwing, Cruel Tormentor / Blitzwing, Adaptive Assailant Starscream, Power Hungry / Starscream, Seeker Leader Slicer, Hired Muscle / Slicer, High-Speed Antagonist Arcee, Sharpshooter / Arcee, Acrobatic Coupe Blaster, Combat DJ / Blaster, Morale Booster Cyclonus, the Saboteur / Cyclonus, Cybertronian Fighter Flamewar, Brash Veteran / Flamewar, Streetwise Operative Goldbug, Humanity's Ally / Goldbug, Scrappy Scout Megatron, Tyrant / Megatron, Destructive Force Optimus Prime, Hero / Optimus Prime, Autobot Leader Soundwave, Sonic Spy / Soundwave, Superior Captain Ultra Magnus, Tactician / Ultra Magnus, Armored Carrier Secret Lair Drops Three Secret Lair Drops were released as part of the Transformers collaboration, and you could buy them together as the Transformers: Foil Bundle and Transformers: Non-Foil Bundle

One was going to be the Staying Power effect, one the More or Less effect, and one an effect that allowed token creatures to survive in other zones
I think this set will have an impact on Magic, more specifically on the Historic format
This Spellslinger Starter Kit doesn't even have fancy names for the two decks included
Mirror Entity