Old Gnawbone

Trample

Whenever this creature deals combat damage to a player, create that many 1/1 green Insect creature tokens.

Trample

Whenever this creature deals combat damage to a player, create a token that's a copy of this creature.

Enchant creature

Enchanted creature has flying.

Whenever enchanted creature deals combat damage to a player, create that many 1/1 green Saproling creature tokens.

Other Snake creatures you control get +2/+2.

Whenever a Snake you control deals combat damage to a player, you may draw a card.

Flying

Whenever this creature deals combat damage to a player, roll a d20. When you do, put X +1/+1 counters on each of up to two target creatures, where X is the result.

Flying

Whenever Rith deals combat damage to a player, you may pay . If you do, choose a color, then create a 1/1 green Saproling creature token for each permanent of that color.