Tainted Observer

Flying When this creature enters, draw a card, then discard a card.

This land enters tapped unless you control two or fewer other lands. T: Add R or G.

Flying If you would proliferate, proliferate twice instead. 1U/PU/P, Remove three counters from among other artifacts, creatures, and planeswalkers you control: Put an indestructible counter on Tekuthal. (U/P can be paid with either U or 2 life.)

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.) Skrelv can't block. W/P, T: Choose a color. Another target creature you control gains toxic 1 and hexproof from that color until end of turn. It can't be blocked by creatures of that color this turn. (W/P can be paid with either W or 2 life.)

If one or more tokens would be created under your control, twice that many of those tokens are created instead. 1W/PW/P, Sacrifice two other artifacts and/or creatures: Put an indestructible counter on Mondrak. (W/P can be paid with either W or 2 life.)

T: Put an oil counter on The Filigree Sylex. T, Sacrifice The Filigree Sylex: Destroy each nonland permanent with mana value equal to the number of oil counters on The Filigree Sylex. T, Remove ten oil counters from among permanents you control and sacrifice The Filigree Sylex: It deals 10 damage to any target.

For Mirrodin! (When this Equipment enters, create a 2/2 red Rebel creature token, then attach this to it.) Equipped creature has flying. Creatures you control that are equipped get +1/+0. Equip 2W

This artifact enters with four oil counters on it. T, Remove an oil counter from this artifact: Tap target artifact or creature.