One of the more welcome features is that you can easily scan cards that are damaged or contain text from different languages
Grazilaxx, Illithid Scholar plays well with the unblockable trigger from Peacock, and it also lets you attack into an unfavorable blocking situation where you can bring back the creatures that would otherwise die and recast them
Juzam Djinn, Mana Batteries, Dingus Egg, Gauntlet of Might, Icy Manipulator, Knowledge Vault, and Juggernaut, the list goes on and on, plus it speeds up your chances for that Sengir Vampire or Serra Angel
Secondly, keep in mind that 'lag' is a general term and could apply to both slow down (e.g., frames per second/FPS), or reduced responsiveness during gameplay
Since spells cant be countered while Lier is on board, you need to think outside the box when it comes to stack interaction
Return those creatures to their owners hands