For this reason, it's difficult to get a more precise value on PriceCharting
(Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) Four generic, one black, one green, tap, Sacrifice Broodspinner: Create a number of 1/1 black and green Insect creature tokens with flying equal to the number of card types among cards in your graveyard
You need to set up a good turn for him, and even afterwards you need to have enough mana (or survive another turn) to make use of the emblem, but it's very achievable with some good planning
Much like Gideon Blackblade's various +1 abilities, just about all of the aspects of Force of Virtue have been utilized effectively - a free anthem on the opponent's turn, as a instant speed anthem and even as a anthem on the opponent's turn
Luckily, beginners have a few places to turn to
The top-card table below uses the local PriceCharting cache and Fuji card-list image set where available, then frames each card by why a buyer would care