In cases like these, your best bet is to phase the creature out with a spell like Slip Out the Back
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And if those ETB creatures include something like, say, Eternal Witness or Auramancer to bring it back
plus a year past Geoffrey Siron's deck from Columbus the previous Extended Pro Tour: U/G Madness | FORMAT | Geoffrey Siron, Pro Tour Columbus 2004 Creatures (20) 1 Merfolk Looter 1 Thought Courier 2 Wonder 4 Aquamoeba 4 Arrogant Wurm 4 Basking Rootwalla 4 Wild Mongrel Instants (9) 2 Intuition 3 Daze 4 Circular Logic Sorceries (9) 2 Roar of the Wurm 3 Deep Analysis 4 Careful Study Artifacts (2) 2 Chrome Mox Lands (20) 7 Forest 9 Island 4 Yavimaya Coast Sideboard (15) 4 Chill 2 Masticore 3 Oxidize 1 Ray of Revelation 3 Submerge 2 Waterfront Bouncer Yes, the Savage Bastard was the best
The ability to exile and return one of your creatures to the battlefield is of great value for creatures that have enter-the-battlefield effects
With no single-mana cards in hand, I couldnt play any creatures to block, even if I was keen to sacrifice them, so I took 9 damage straight away