Xanos the I.

+2: each player becomes one damage for each artefact there control, then you may draw a card for each player damage was dealth this way
-2: you get an artefact with: "artefacts you control become 1/1 artefact creatures with flying in addition to there other abilities and types "
-16: you get an artefact with: "artefacts and creatures you control have +1/+1 Trample and annihilator 1"