Hello and welcome to my first build.
this build is about ziggs the hexplosives expert.
comment some things about what you would like to see improved in this build ;)

for the runes i think its the best to take
Flat magic pen marks,
mana regen seals increasing per level,
Flat AP glyphs and flat AP quintessences
you could also take AP glyphs increasing by level.
but it depends on how you want to play

he does have some cons
but first the Pros
+Great AoE damage
+INSANE smile :3
+HUGE ulti range and great basic range too
+awesome mad scientist skin
+looks like the brother of teemo
Cons
-Mana hungry early-mid game
-VERY squishy +solvable by relais and rod of ages
-Fast focussed ± minefield and satchel charge to escape
-Danger icon with ulti± People will see it too late too often

for ziggs i take 21-0-9 for maximum damage output and the 5% extra AP stakcs nicely with the rabadons deathcap increased change to finish a champion easely

ziggs is very dependant of teamwork when not in mid lane, its recommended to stay behind the melee so you wont get attacked that fast. trow bombs around the melee to defend him *very important* and be sure whatever you do go rush sorceress shoes and deathcap at first
the farming abilitys are just awesome with ziggs the caster minions die faster then the mellee minions so autoattack the melee minons and trow 1 bomb at the caster minons for farming.

you can choose to get a void staff earlier when people go stack magic resist or take abysall scepter when they just dont because it will give magic pen but 40% magic pen would just be a waste

Ziggs was born with a talent for tinkering, but his chaotic, hyperactive nature was unusual among yordle scientists. Aspiring to be a revered inventor like Heimerdinger, he rattled through ambitious projects with manic zeal, emboldened by both his explosive failures and his unprecedented discoveries. Word of Ziggs' volatile experimentation reached the famed Yordle Academy in Piltover and its esteemed professors invited him to demonstrate his craft. His characteristic disregard for safety brought the presentation to an early conclusion, however, when the hextech engine Ziggs was demonstrating overheated and exploded, blowing a huge hole in the wall of the Academy. The professors dusted themselves off and sternly motioned for him to leave. Devastated, Ziggs prepared to return to Bandle City in shame. However, before he could leave, a group of Zaunite agents infiltrated the Academy and kidnapped the professors. The Piltover military tracked the captives to a Zaunite prison, but their weapons were incapable of destroying the fortified walls. Determined to outdo them, Ziggs began experimenting on a new kind of armament, and quickly realized that he could harness his accidental gift for demolition to save the captured yordles.

Before long, Ziggs had created a line of powerful bombs he lovingly dubbed ''hexplosives.'' With his new creations ready for their first trial, Ziggs traveled to Zaun and sneaked into the prison compound. He launched a gigantic bomb at the prison and watched with glee as the explosion tore through the reinforced wall. Once the smoke had cleared, Ziggs scuttled into the facility, sending guards running with a hail of bombs. He rushed to the cell, blew the door off its hinges, and led the captive yordles to freedom. Upon returning to the Academy, the humbled professors recognized Ziggs with an honorary title - Dean of Demolitions - and proposed that he demonstrate this new form of yordle ingenuity in the League of Legends. Vindicated at last, Ziggs accepted the proposal, eager to bring his ever-expanding range of hexplosives to the greatest testing grounds in the world: the Fields of Justice.

''Ziggs? Unpredictable, dangerous, yes yes. But quite brilliant!'' - Heimerdinger