Particle Accelerator

When Particle Accelerator enters the battle field: create X {e} counters, where X is the number of artifacts you control
Whenever an element enters the battle field under
your control: all artifacts you control untap
{1}{t}: create 1 {e} counter
{e}{e}{p/u}{p/b}{t}: create 1 particle token
Sacrifice 5 particle tokens: summon an element
card from Particle Accelerator's spellbook
Indestructible, Ward 5 {e} and {5}