Xanos the I.

+2: each player gets one damage for each artefact there control, then you may draw a card for each player who controls an artefact
-2: you get an artefact with: "artefacts are 1/1 artefact creatures with flying in addition to there other abbilities and types"
-16: you get an artefact with: "artefacts and creatures you control have +1/+1, Trample and annihilator 1"