Ornery Tumblewagg, Crystalline Crawler, and Najeela, the Blade-Blossom

Prerequisites

• Ornery Tumblewagg on the battlefield
• Crystalline Crawler on the battlefield
• Najeela, the Blade-Blossom on the battlefield
• Crystalline Crawler has at least three +1/+1 counters on it
• Ornery Tumblewagg does not have summoning sickness and cannot be blocked and killed by an opponent

Steps

1. Activate Ornery Tumblewagg's saddle ability by tapping Crystalline Crawler, causing Ornery Tumblewagg to become saddled until end of turn
2. At the beginning of your combat phase, Ornery Tumblewagg's first ability triggers, putting a +1/+1 counter on Crystalline Crawler
3. Declare Ornery Tumblewagg and Najeela, if desired, as an attacker
4. Ornery Tumblewagg's second ability triggers, doubling the number of +1/+1 counters on Crystalline Crawler
5. If Najeela was declared as an attacker, it triggers, creating a 1/1 Warrior creature token that is tapped and attacking
6. Activate Crystalline Crawler's first ability five times by removing five +1/+1 counters from it, adding
7. Activate Najeela by paying , untapping all attacking creatures, giving them trample, lifelink and haste, and gaining an additional combat phase after this one
8. Repeat from step 2
9. If Crystalline Crawler begins the combo with four or more +1/+1 counters, this combo will net infinite +1/+1 counters on it and colored mana, which will allow you to target any other creature(s) using Ornery Tumblewagg's triggers

Results

• Infinite +1/+1 counters
• Infinite colored mana
• Infinite combat phases
• Infinite creature tokens with haste
• Infinite ETB