Snapcaster Mage [Modern Masters 2017] League Tokens 2015 {T}: Counter target activated ability

{T}: Counter target activated ability from an artifact source unless that ability's controller pays {W}

its owner loses half their life

(They can block and be blocked only by creatures with shadow

return it to the battlefield under your control at the beginning of the next end step

If any creatures with banding a player controls are blocking or being blocked by a creature

Snapcaster Mage [Modern Masters 2017] League Tokens 2015 {T}: Counter target activated abilitySet: Modern Masters 2017 Type: Creature Human Wizard Rarity: Mythic Cost: {1}{U} Flash When Snapcaster Mage enters the battlefield, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)