Cheapest priced copy (RNA Guild Kit): $0.35 at Card Kingdom, near mint, their price list as of .
Crypt Champion 
Creature — Zombie · 2/2 · Uncommon · The List · #GK2-53
Double strike
When this creature enters, each player puts a creature card with mana value 3 or less from their graveyard onto the battlefield.
When this creature enters, sacrifice it unless {R} was spent to cast it.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dissension | 40 | Uncommon | $0.39 | $0.79 |
| RNA Guild Kit | 53 | Uncommon | $0.35 | — |
| The List | GK2-53 | Uncommon | $0.35 | — |
2 rulings from Wizards of the Coast
- 1 May 2006The first triggered ability isn't targeted, so the creature cards aren't chosen until the ability resolves. Each player chooses which creature card from their own graveyard to return. If a player doesn't have an applicable creature card, that player does nothing. If a player does have any applicable cards, that player must return one to the battlefield.
- 1 May 2006If this enters in a way other than announcing it as a spell, then the appropriate mana can't have been paid, and you'll have to sacrifice it.