Theyre both fantastic with fetch lands, but Lotus Cobra is mana neutral on turn three when you play it, then play and crack a fetch
If possible, try to have as many creatures on the battlefield as possible before Toski enters, that way you can attack and draw cards right away
And a few years ago, David Howell - with Richards blessing - sold his copy
The fact that you hit their mana base, and the land they replace enters with a stun counter is almost like true land destruction in the short term
The Tarrasque There are plenty of decks where 9 mana isnt too high of a price, especially not for a creature like The Tarrasque
Conceivably, you could set up your deck so that every non-Aether Rift card is a huge creature that forces life payments each turn