Karn, Silver Golem + Leyline of Abundance + Basalt Monolith
Karn, Silver Golem
Leyline of Abundance
Basalt Monolith
Requires
Karn, Silver Golem must be on the battlefield.
Leyline of Abundance must be on the battlefield.
Basalt Monolith must be on the battlefield.
Basalt Monolith does not have summoning sickness.
Mana needed: 
Steps
- Activate Karn by paying , causing Basalt Monolith to become an artifact creature until end of turn.
- Activate Basalt Monolith's first ability by tapping it, adding .
- Activate Basalt Monolith's last ability by paying
, untapping it. - Repeat from step 2.
Results
Infinite +1/+1 counters. Infinite colorless mana. Infinite green mana.
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