Night of the Living Weird Trivia Quiz

Answer: Blue and red

Three of the Weirds have both a red mana symbol and a blue mana symbol in their mana cost, while three have a hybrid red/blue symbol. One is just blue, but spending red mana on it has an additional effect.

Answer: Whenever you cast an instant or sorcery spell

Only one of the three originally created Weirds had this phrase, but of the four that were created years afterwards, three of them had the phrase.

Each of the four with this phrase has a different second half. Three of them have their own card name in it. Here they are:

Whenever you cast an instant or sorcery spell, Blistercoil Weird gets +1/+1 until end of turn. Untap it.
Whenever you cast an instant or sorcery spell, you may switch Fluxcharger's power and toughness until end of turn.
Whenever you cast an instant or sorcery spell, you may untap Gelectrode.
Whenever you cast an instant or sorcery spell from your library, copy it. You may choose new targets for the copy.

Answer: Guildpact

The Weirds in Guildpact are Steamcore Weird, Petrahydrox, and Gelectrode. The name of the last one is a portmanteau of "gel" and "electrode". Steamcore Weird and Gelectrode were reprinted in Duel Decks: Izzet vs. Golgari.

Answer: Their power is less than or equal to their toughness

Their power is less than (in 5 cases) or equal to (in 2 cases) their toughness. However, three of the Weirds have abilities that change their own power and toughness.

There is one rare Weird, and it is the only one that has a second creature type. It is a Weird Wizard.
One weird (Gelectrode) has 0 power, but it can tap to deal damage.

Answer: Melek, Izzet Paragon

While all four of these are legendary creatures are from the Izzet guild, only "Melek, Izzet Paragon" is a Weird. It is actually a Weird Wizard. Both "Niv-Mizzet" creatures are a Dragon Wizard, and "Tibor and Lumia" is a Human Wizard. These are all Izzet legendary creatures, and they are all a wizard in addition to being something else.

Answer: Gatecrash

Return to Ravnica had 5 of the 10 guilds, while Gatecrash had the other 5. Since Return to Ravnica had the Izzet guild, the Izzet guild could not appear in Gatecrash, and therefore Gatecrash had no Weirds. Dragon's Maze had all 10 guilds.

Duel Decks: Ajani vs. Nicol Bolas and Duel Decks: Izzet vs. Golgari are the other two sets that had at least one Weird in them. Duel Decks often have cards that are reprinted from a variety of sets.

Answer: Defender

These Weirds are not meant to attack - they are meant to block attacking creatures. Since Thunderheads is an instant, it can be cast after the opponent has declared attackers. The flavor text of Thunderheads is a pun on the word "grew": "The clouds grew thick, and then they grew teeth."

Answer: Frostburn Weird

Its activated ability costs 1 red or blue mana, and activating it gives Frostburn Weird +1/-1 until end of turn, increasing its power but decreasing its toughness. It can be activated multiple times.

Answer: Petrahydrox

Petrahydrox can be cast using 4 mana, one of which is either red or blue. It has 3 power and 3 toughness, and the ability "When Petrahydrox becomes the target of a spell or ability, return Petrahydrox to its owner's hand." The flavor text of Petrahydrox is "It departs through the streets' fissures with a sound like gravel pouring into a pond."

Answer: Flying

Fluxcharger has flying. All seven Weirds (including Fluxcharger) have at least one ability that is not a keyword.

Trample would not fit red or blue. Replicate and Retrace are abilities on instant and sorcery spells, not creature spells.