Happy Hour/Summoning

In Summoning Happy Hour event allows player summon a dragon using 99 Joker Orbs of the same rarity, while normally it is required 80 orbs of (most of) specific dragon in order to use 20 Joker Orbs.
Summoning Happy Hour event may also offers some Joker Orbs in Triple Offer. 
=== Note ===
Because Summoning Happy Hour allows only 99 Joker Orbs to fill. Unlike most of dragons (that required 100 orbs to summon), Some dragons are not able to summon even owning a single orb due to higher orb requirement.
Dragon type 	Summoning Requirement	Summoning Requirement 	Summoning Requirement
Dragon type 	Without Joker Orbs 	With Joker Orbs 	With Joker Orbs
Dragon type 	Without Joker Orbs 	Normal DayAble to use up to 20 Joker Orbs	Summoning Happy HourAble to use up to 99 Joker Orbs
Common, Rare, Very rare, Epic, regular Legendary and legendary Titans 	100 	80 Orbs of a dragon 	1 Orbs of a dragon
Regular Mythicals 	150 	130 Orbs of a dragon 	51 Orbs of a dragon
Most of VIP Legendary and Mythical Dragons incl. mythical Titans, Vampires, Corrupted , Ascendeds, Karmas, Redemptions, Arcanas, Plasmas, Quantums, Berserks	200 	180 Orbs of a dragon 	101 Orbs of a dragon
High Nest Dragon and newer heroic dragons 	200 	180 Orbs of a dragon 	101 Orbs of a dragon
All Heroic VIP Dragons 	500 	480 Orbs of a dragon 	401 Orbs of a dragon
==Trivia==
* Before Summoning Happy Hour was fixed, It used to be able to use 100 Joker Orbs of the same rarity instead of 99 according to a pop up message.