Supportive Riley

{1}{x}{t}: You gain x+X life,
Where X is the additional mana paid for this card
and x is the additional mana paid when tapping
this card.
Sacrifice Supportive Riley for {c}{c}{c}
{1}: Add +0/+1 or {2}: add +0/-1 to target creature
(Use this ability as if it were an instant.)
Very supportive!