Tricky Towers

The waves in endless survival mode are random black magic spells that the AI wizard will conjure up every ~30 seconds. They're never the same and can come combined (weight spell + chain spell = big bricks that you can't rotate).

To get this trophy, you need to survive the 8th wave. That means you must successfully place one brick after the 8th wave is over without losing the game in the process. The difficulty increase with each wave and the 7th and 8th wave are very difficult, but sometimes it will just be a speed-up spell. It's entirely random and the trophy can be therefore easier or harder depending on your luck with the waves.

You can see more tips on Perfect start