Cast Zellix, the Altar triggers, and then if any opponent mills a creature card, Zellix makes a horror token and Altar triggers again
Whereas way back when you could draw a card, play a land, play a creature, and get to make another attack (still very good) the general power level of MTG cards has increased to the point that players can achieve so much more in a single turn
Weve all been on the receiving side of a turn-1 Sol Ring + Arcane Signet start, allowing someone to cast a 4- or 5-drop commander on turn 2
However, unless you are truly a honed veteran, I would try and refrain from playing more than three colorsas tempting as it may be
Whenever he or another of your creatures dies, you can grab a creature with lower toughness from your graveyard and add it to your hand
Isochron Scepter will certainly find a home in the 99 of any Orvar deck