If Scourge of Valkas is on the battlefield, he'll do damage to a target equal to the number of creatures you control, as they'll also have all creature types
For seven mana you get an on curve 7/7 with four powerful keywords - flying (evasion), vigilance (very strong in multiplayer swinging at people in the air for Commander Damage and then holding the fort), deathtouch (no one wants to block) lifelink (nice double life swing for that 7 damage.)
Ragavan, Nimble Pilferer Apologies to Ragavan, Nimble Pilferer
Depends on Who You Ask Yes, its great for new players to have access to many jumping-in points, and for budget-minded players who want to play powerful cards on the cheap
Reach the Horizon Rating: 4/10 Four-mana spells that dont affect the board can often be a liability, so the faster the format is, the less likely I am to want to play Reach the Horizon
Mystic Remora presents a trade off: do you want the cards, or the mana to cast them