MF DOOM

When this card enters the battlefield, if {g}{b} was spent to cast it, choose one of the following:
• Tap target land, add {1} to your mana pool.
• Until your next turn, all other Humans enter the battlefield with an extra +1/+1 counter on it.
Wordplay—Opponents can not cast spells or activate abilities that have the same name as a spell that has been played this turn.