Open the Waygate

Open the Waygate is a legendary mage spell card, from the Journey to Un'Goro set.

Strategy
Spells and minions which generate spells are required for this Quest. Cabalist's Tome, Babbling Book, Kabal Courier, Evocation, Primordial Glyph, Mana Cyclone, Steam Surger, and Banana Buffoon are a few examples that can do this.

Timing is important once Time Warp is acquired. The effect is very powerful, but requires some set up. It can allow minions you played prior to starting the extra turn to attack, lets your active minions attack a second time, and allows a second trigger from end-of-turn effects like Ragnaros the Firelord and Emperor Thaurissan. At its most basic, this card grants the mage an extra turn's worth of mana, minus the cost of Time Warp itself - a total of 15 mana if saved until turn 10. This extra mana allows the use of card combos that would be otherwise too expensive to play without the opponent having a chance to interfere.

Time Warp can be notably exploited with Archmage Vargoth as early as turn 9, who can recast Time Warp to give you two extra turns, allowing you to deal even more damage to the enemy hero than usual or eliminate obstacles to your combos.

List of combos
Place two Arcane Giants with Time Warp, then on the extra turn use Alexstrasza's Battlecry on the opponent. Mana Giants can be added to add extra damage to this combo, which also synergize well with the deck. This is combo is relatively simple to pull off, but is preventable with Armor and Taunt minions.
 * Arcane Giant x2 + Mana Giant x2 + Alexstrasza

Play two Sorcerer's Apprentices, followed by one Molten Reflection to copy an Apprentice, followed by Time Warp, for a total of 8 mana. On the extra turn, play Archmage Antonidas and then play the second Molten Reflection on a Sorcerer's Apprentice for 1 mana, generating a Fireball. This 5-card combo allows the player to have infinite 0-mana Fireballs, which is nearly guaranteed to kill the opponent and is completely uninterruptible by the opponent without Secrets already in play. This combo can be started on turn 8 (with the extra turn on 9). With the coin, this combo is available on turn 7, since the second turn also only requires 8 mana.
 * Sorcerer's Apprentice x2 + Molten Reflection x2 + Archmage Antonidas

Time Warp, Mimiron's Head, and two Target Dummies costs 10 mana to play, which will then summon V-07-TR-0N on the extra turn. While the combo itself isn't lethal, Spare Parts synergizes with the quest well and the combo can be combined with other cards to increase both flexibility and kill potential. A discounted Clockwork Gnome or Mechwarper via Emperor Thaurissan can be substituted for the Target Dummies, and V-07-TR-0N can be made lethal with Reversing Switch or Molten Reflection.
 * Mimiron's Head + Target Dummy x2

First you will use Baku the Mooneater in an Odd costed deck to upgrade your hero power to Fireblast Rank 2 at the start of the game. Play one Clockwork Automaton followed by Time Warp costing 10 mana. On the next turn play another Clockwork Automaton and two Daring Fire-Eaters for 7 mana. Leaving you with 3 mana to use your hero power, which now deals (2+4)x2x2=24 damage + the 4 attack of the Clockwork Atomaton you played the first turn of the combo. This in itself isn't lethal if the opponent has 29 or more health or 25 health and a minion with taunt but there are ways to make it lethal for up to 36 health. For example you could use Simulacrum to add an extra copy of Daring Fire-Eater to your hand at some point during the game. You can then play out three Fire-Eaters instead of two during your second turn of doing the combo. First you play one Clockwork Automaton followed by Time Warp costing 10 mana. On the next turn play another Clockwork Automaton and three Daring Fire-Eaters for 8 mana. Leaving you with 2 mana to use your hero power, which now deals (2+6)x2x2=32 damage + the 4 attack of the Clockwork Automaton you played the first turn of the combo.
 * Daring Fire-Eater x2 + Clockwork Automaton x2 + Baku the Mooneater

Lore
The is a  portal that leads from  to. It's been inactive for centuries, but players in World of Warcraft can reactivate it through a quest line. This card is probably inspired by that quest. It is unknown whether the Time Warp reward is specifically related to the bending of spacetime by the Waygate, or if it is generally an effect mages can achieve given an adequate source of magical power.

Trivia

 * Open the Waygate's flavor text is a reference to "", a song featured in the 1973 rock musical .

Patch changes

 * Fixed a visual bug where viewing progress would no longer highlight cards in hand that did not start in your deck.
 * Now requires 8 spells to be cast (Up from 6).
 * Will now correctly progress with spells that have been replaced by Lilian Voss.
 * Added.