Dunka Danka

This spell costs 1 additional mana of any color. Depending on the color, it has one of the following effects:
{u} - draw X cards;
{b} - lose X life, deal X*2 damage to target player;
{r} - deal X damage to any target;
{g} - creature gets +X/+X until your next upkeep;
{w} - gain X life.
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That's how it is!