Its a guaranteed two damage for two mana, and the possibility of swinging in for three on top of that is just too juicy to resist
Since our two best threats are a black card and a colorless card, one of our two colors should be black
White If theres one thing that the other colors can be envious of white for, its the removal suite
Drawing cards with those artifacts that are just sitting around, too
However, if a single creature with lifelink deals combat damage to multiple creatures, players, and/or planeswalkers at the same time (perhaps because it has trample or was blocked by more than one creature), the ability will trigger only once
This will just ware on the card and sleeve more than normal