But similarly to how it works with Mairsil, Quicksilver Elemental allows you to break that rule
Think Twice is the poor control mans universal replacement for Thirst for Knowledge when it has insufficient artifacts
It doesnt really matter if your hand is a Pikachu, a Stinkweed Imp, a three of clubs, a Goblin token, a rules insert, a Golgari Thug, and a Barry Bonds rookie card, youre still going to be able to deal seven damage by discarding them all to flash back a Conflagrate
They can also be used in conjunction with cards like "Sword of the Animist" or "Ghirapur Orrery" to enable powerful ramp strategies
Basic lands are literally free at any LGS or Grand Prix in the country
The pay off, even if they are main decking cards like Pernicious Deed will wind up in your favour overall