Urza, Lord High Artificer + Deadeye Navigator + The Ooze + Arcbound Condor
Urza, Lord High Artificer
Deadeye Navigator
The Ooze
Arcbound Condor
Infinite artifact ETBInfinite artifact LTBInfinite artifact sacrifice triggersInfinite artifact tokensInfinite +1/+1 counters on creatures you controlInfinite Mutagen tokensReduce any number of opposing creatures' toughness to 0Cast all spells in your libraryExile your libraryInfinite creature ETBInfinite creature LTBInfinite blinkingInfinite blue manaInfinite creature tokens
How it works
Activate Arcbound Condor by paying 1, blinking it.
Arcbound Condor leaves and reenters the battlefield, causing it to enter with +1/+1 counters due to its modular ability, and triggering The Ooze and Deadeye Navigator's soulbond ability.
Resolve Deadeye Navigator's trigger, repairing it and Arcbound Condor
Resolve The Ooze's trigger, creating a Mutagen token for each +1/+1 counter that was on Arcbound Condor when it left the battlefield.
When the Mutagens enter, Arcbound Condor triggers that many times, giving a creature an opponent controls -1/-1 until end of turn for each trigger.
Activate Urza's first ability twice by tapping Arcbound Condor and a Mutagen, adding .