It just so happens that one Toby Elliott, he also of the Commander RC, is sitting over my shoulder at the moment (hes come to Florida to help me heal up)
It wont break any format, but the price and the benefits are quite nice for white builds
The four-mana Dimir colored 4/4 with lifelink and ward 1 (I'd prefer 2 for that casting cost) has an ETB ability to look at a hand and then force a discard and draw
These might change over time
Kefka, Court Mage / Kefka, Ruler of Ruin Every time Kefka, Court Mage enters or attacks, it forces discards while refilling your hand with extra cards
Costing three green makes it hard to justify in mixed-color decks, but it's an instant that can find lands to put into play, buff your creatures, and act as artifact, enchantment and creature removal