While this occasionally can include a general (for instance, Meren of Clan Nel Toth), this most often means colorless cards that can go inro any Commander deck
On its own it can dash in and deal 6 damage, or it can crash for 4 while backing up another creature and granting that double strike instead
Tivit, Seller of Secrets Tivit, Seller of Secrets is primarily here for the Time Sieve combo that made it relevant in cEDH of all places, but you can play it more casually: A great attack trigger that comes with a surge of mana is perfectly suitable to pair with Temporal Trespass and what have you
Legendary Planeswalker - Chandra Color tag templates(None) Koth, Fire of Resistance +2: Search your library for a basic Mountain card, reveal it, put it into your hand, then shuffle
For those newer to Magic: The Gathering, the whole point of Jumpstart is speed: take two boosters, shuffle them together, and you have a playable deck with all the Lands already included
Remember, the number of cards depends on the format of the deck, so a preconstructed Brawl deck will have 100 singleton cards
