Turn 11 full T6 board - how?

How in realistic turn, can you fill a board with T6 minions by turn 11. They had pretty good buffs on them as well, meaning he got them earlier… HOW?

He had Golden goldryn 2 Irridescent Skyblazers, 2 Ghoul-acabras Ghastcoiler and Golden Trigore…

the other opponent had Golden and normal Ghoul-acabra, 2 Golden Trigores Golden Irridescent Skyblazer and Golden Spiked Saviour on turn 12 and Golden Parrot all with Reborn except the Trigore