public bool useCard(player owner, player opponent)
{
if (owner.manaChange(this.manaCost))
{
owner.hitPointChange(this.heal);
opponent.hitPointChange(this.damage*(-1));
if (this.isDrawCard)
owner.pickACard();
if (this.display != "")
{
Console.WriteLine(this.display);
}
return true;
}
else
{
Console.WriteLine("you don't have enough mana crystal!");
return false;
}
}
