You may cast either half using discover, but you cannot cast both halves
You can do worse for an insect commander, but you can absolutely do better
A card can be a little pricey and dead in your hand sometimes if it means that its incredible strength is going to make up for the fact you were clogged on three of them for a few turns
Examples include Tuktuk the Explorer, Nosy Goblin, Bazaar Trader, Kiki-Jiki, Mirror Breaker, and Goatnapper
You can play the entire Dark Depths combo from your graveyard each turn, play two fetch lands (or the same fetch twice) for four total landfall triggers, make your opponents cry with Strip Mine this card is absurdly powercrept
Valakut, the Molten Pinnacle's triggered ability has an "intervening 'if' clause." That means (1) the ability won't trigger at all unless, at the time a Mountain enters under your control, you control five or more Mountains other than that new one, and (2) the ability will do nothing if you control fewer than five Mountains other than that new one by the time it resolves