Zilean

Strengths

You can combine the use of Time Bomb and Rewind to place two Time Bombs on a target quickly. Placing the second bomb will detonate the first and stun all nearby enemies.
Time Warp is an effective way to enable allies to finish off enemies, or escape from a losing battle.
Chronoshift is a powerful deterrent to attacking your carries, but casting Chronoshift too early in a fight can cause the enemy to switch targets too soon, making it less effective.

Passive · Time In A Bottle — Zilean stores time as Experience and can grant it to his allies. When he has enough Experience to finish an ally's level up, he can right-click them to impart it. Zilean receives as much Experience as he gives.
Q · Time Bomb — Tosses a bomb to target area that sticks to units that come near it (prioritizes Champions). It detonates after 3 seconds, dealing area of effect damage. If a Time Bomb is detonated early by another Time Bomb, it also stuns enemies.
W · Rewind — Zilean can prepare himself for future confrontations, reducing the cooldowns of his other basic abilities.
E · Time Warp — Zilean bends time around any unit, decreasing an enemy's Move Speed or increasing an ally's Move Speed for a short time.
Ultimate · Chronoshift — Zilean places a protective time rune on an allied champion, teleporting the champion back in time if they take lethal damage.

A suggested 5-lane lineup built around Zilean, based on hero partnerships and role synergy — not win rate.