Boomstacker

Creature - Goblin/Artificer
As Boomstacker enters the battlefield and whenever it attacks, stack two dice on top of it. (All dice must be stacked vertically, one on top of another.) <CR>
Boomstacker gets +1/+1 for each die in its stack. <CR>
Boomstacker attacks each combat if able. <CR>
When the stack falls, sacrifice Boomstacker.

Creature - Goblin/Artificer
As Boomstacker enters and whenever it attacks, stack two dice on top of it. (All dice must be stacked vertically, one on top of another.) <CR>
Boomstacker gets +1/+1 for each die in its stack. <CR>
Boomstacker attacks each combat if able. <CR>
When the stack falls, sacrifice Boomstacker.