If the copied creature is copying something else, then Silent Hallcreeper becomes a copy of whatever that creature copied
If they die, get exiled or anything else that removes them from the board, you can instead put them back in the Command Zone, but you have to pay two more mana to cast them - and that cost goes up every time
The perfect introduction for new players, each deck also comes with a strategy insert to help you make the most of your deck's abilities and a reference card for what to do on your turn
Then I realized it is a fair 2 mana = 1 damage combo that is instead very difficult to deal with because Burning-Tree Emissary is always safe in the hand, Temur Sabertooth can get indestructible if you always keep 2 mana open and have another creature on the board and Outpost Siege is an enchantment
Cards like Tropical Island are between two and three times the Beta price, while as we slouch down toward Armageddon, its still almost double the Beta price