Nettling Imp [Alpha Edition] Elemental Horse where X is the mana

where X is the mana value of the exiled creature

Set: Antiquities Type: Artifact Rarity: Rare Cost: {3} Whenever an artifact you control is put into a graveyard from the battlefield

Set: Legends Type: Legendary Creature — Human Warrior Rarity: Rare Cost: {4}{R}{G}{W} When Hazezon Tamar enters the battlefield

And at his passing

Set: Magic Player Rewards 2009 Type: Instant Rarity: Rare Cost: {1}{U}{U}{U} Choose two —

Nettling Imp [Alpha Edition] Elemental Horse where X is the manaSet: Alpha Edition Type: Creature Imp Rarity: Uncommon Cost: {2}{B} {T}: Choose target non Wall creature the active player has controlled continuously since the beginning of the turn. That creature attacks this turn if able. Destroy it at the beginning of the next end step if it didn't attack this turn. Activate only during an opponent's turn, before attackers are declared.