If you have all cheap, small creatures, then a single big creature can shut you down
Each contain the same packs you can (in theory) buy right now in the sticker collections, but with different bonus materials (and yes, we could have sold them for four times their recommended retail price as thats what pre-orders are currently being resold for, but thankfully we have some morals)
This works very well with the Gearhulk cycle, with Solemn Simulacrum, modular creatures, good old cards like Wurmcoil Engine and Myr Battlesphere the list goes on and on
Then you can -1 him to toss a +1/+1 counter onto all the things in one sector (theirs too)
each double pack set has the ability to boost your current deck or alternatively can give you the option to alter your strategies with the various cards on offer in each pack
To summarise the combo: Cast Threefold Thunderhulk, which makes you three gnome tokens Copy it with Saheeli, Radiant Creator, which makes 8 more gnomes tokens As the copy of Threefold Thunderhulk's base power and toughness is now 5/5 and enters with three additional +1/+1 counters Attack with Threefold Thunderhulk and make another 8 gnome tokens You would be left with the original Threefold Thunderhulk as a 3/3 and nineteen 1/1 gnome tokens There is a little bonus to the Threefold Thunderhulk, as it has one more ability