For the rare slot, Every pack offering a chance at an insane rarity card
Everyone who has played Epic has probably figured out that Brachiosaurus is a good card, because it allows you to essentially play 2 Wild gold-cost cards on your turn
But tapping four elves is a bigger cost than we often want to pay
So have the forest, the city, your palace, your dog..." Keldon soldier Killer Instinct (Guildpact) Canyon Minotaur (2011 Core) "We'll scale these cliffs, traverse Brittle Bridge, and then fight our way down the volcanic slopes on the other side." "Isn't the shortest route through the canyon?" "Yes." "So shouldn't we" "No." Aluren (Tempest) Squee bounced up and down
Or for more helpful info, try out guide to the MTG release schedule.
Combine the two abilities with some effect that will let you make mana like Ashnods Altar and Pitiless Plunderer, which will net you six mana when you sacrifice them all between the Altar and Treasure tokens